BEGIN:VCALENDAR
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PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Matthew Pressland (University of Leeds)
DTSTART;VALUE=DATE-TIME:20200521T130000Z
DTEND;VALUE=DATE-TIME:20200521T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/1
DESCRIPTION:Title: Calabi–Yau properties of Postnikov diagrams\nby Matthew Pressland
(University of Leeds) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:David Pauksztello (Lancaster University)
DTSTART;VALUE=DATE-TIME:20200528T130000Z
DTEND;VALUE=DATE-TIME:20200528T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/2
DESCRIPTION:Title: Simple-mindedness: negativity and positivity\nby David Pauksztello
(Lancaster University) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniel Labardini-Fragoso (UNAM)
DTSTART;VALUE=DATE-TIME:20200604T130000Z
DTEND;VALUE=DATE-TIME:20200604T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/3
DESCRIPTION:Title: Schemes of modules over gentle algebras and laminations of surfaces
\nby Daniel Labardini-Fragoso (UNAM) as part of FD Seminar\n\nAbstract: TB
A\n
LOCATION:https://researchseminars.org/talk/fd-seminar/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Haruhisa Enomoto (Nagoya University)
DTSTART;VALUE=DATE-TIME:20200618T130000Z
DTEND;VALUE=DATE-TIME:20200618T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/4
DESCRIPTION:Title: Simple objects in torsion-free classes over preprojective algebras of D
ynkin type\nby Haruhisa Enomoto (Nagoya University) as part of FD Semi
nar\n\n\nAbstract\nIn this talk\, I propose to study exact-categorical str
uctures of torsion(-free) classes of module categories. For functorially f
inite torsion-free class\, indecomposable projective and injective objects
are easily described by \\tau^-τ \n−\n -tilting modules\, and in parti
cular\, the numbers of them coincide. However\, there can be more simple o
bjects in torsion-free class\, which I propose to study. I explain that th
e number of simple objects controls the validity of the Jordan–Hölder t
ype theorem in a torsion-free class.\n\nThen I’ll talk about simple obje
cts in a torsion-free class over the preprojective algebra (and path algeb
ra) of Dynkin type\, which is also important in Lie theory due to Geiss–
Leclerc–Schröer’s categorification of the cluster structure. By Mizun
o’s result\, we can associate an element ww of the Weyl group to each to
rsion-free class \\mathcal{F}F. By (extended) Gabriel’s theorem\, \\math
cal{F}F roughly corresponds to the inversion set of ww\, the set of positi
ve roots which are sent to negative by w^{-1}w \n−1\n . Then I show that
simple objects in \\mathcal{F}F are in bijection with Bruhat inversions o
f ww\, which are related to the Bruhat order of the Weyl group.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Louis-Philippe Thibault (NTNU)
DTSTART;VALUE=DATE-TIME:20200611T130000Z
DTEND;VALUE=DATE-TIME:20200611T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/5
DESCRIPTION:by Louis-Philippe Thibault (NTNU) as part of FD Seminar\n\nAbs
tract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ralf Schiffler (University of Connecticut)
DTSTART;VALUE=DATE-TIME:20200625T130000Z
DTEND;VALUE=DATE-TIME:20200625T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/6
DESCRIPTION:Title: A geometric model for the syzygies over certain 2-Calabi--Yau tilted al
gebras\nby Ralf Schiffler (University of Connecticut) as part of FD Se
minar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Claire Amiot (Université Joseph Fourier)
DTSTART;VALUE=DATE-TIME:20200702T130000Z
DTEND;VALUE=DATE-TIME:20200702T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/7
DESCRIPTION:Title: Derived equivalences for skew-gentle algebras\nby Claire Amiot (Uni
versité Joseph Fourier) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Karin Baur (University of Leeds)
DTSTART;VALUE=DATE-TIME:20200716T130000Z
DTEND;VALUE=DATE-TIME:20200716T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/8
DESCRIPTION:Title: Postnikov diagrams and orbifolds\nby Karin Baur (University of Leed
s) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Špela Špenko (Université libre de Bruxelles)
DTSTART;VALUE=DATE-TIME:20200730T130000Z
DTEND;VALUE=DATE-TIME:20200730T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/9
DESCRIPTION:Title: GKZ systems and perverse schobers\nby Špela Špenko (Université l
ibre de Bruxelles) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrea Solotar (Universidad de Buenos Aires)
DTSTART;VALUE=DATE-TIME:20200709T130000Z
DTEND;VALUE=DATE-TIME:20200709T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/10
DESCRIPTION:Title: Bounded extension algebras and Han's conjecture\nby Andrea Solotar
(Universidad de Buenos Aires) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cris Negron (University of North Carolina)
DTSTART;VALUE=DATE-TIME:20200723T130000Z
DTEND;VALUE=DATE-TIME:20200723T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/11
DESCRIPTION:Title: Finite generation of cohomology for Drinfeld doubles of finite group s
chemes\nby Cris Negron (University of North Carolina) as part of FD Se
minar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bernhard Keller (Université de Paris)
DTSTART;VALUE=DATE-TIME:20200903T130000Z
DTEND;VALUE=DATE-TIME:20200903T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/12
DESCRIPTION:Title: Relative Calabi-Yau completions and higher preprojective algebras\
nby Bernhard Keller (Université de Paris) as part of FD Seminar\n\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shijie Zhu (The University of Iowa)
DTSTART;VALUE=DATE-TIME:20200910T140000Z
DTEND;VALUE=DATE-TIME:20200910T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/13
DESCRIPTION:Title: Hopf algebras of discrete representation type\nby Shijie Zhu (The
University of Iowa) as part of FD Seminar\n\n\nAbstract\nHopf algebra is a
n important topic in geometric representation theory. A basic algebra is o
f finite representation type if there are only finitely many non-isomorphi
c indecomposable representations. Basic Hopf algebras of finite representa
tion type have been classified by Liu and Li in 2004. As algebras\, they a
re just copies of Nakayama algebras. A pointed coalgebra is of discrete re
presentation type\, if there are only finitely many non-isomorphic indecom
posable representations for each dimension vector. In this talk\, I am goi
ng to give a classification of pointed Hopf algebras of discrete represent
ation type. The main tool we are using is called “covering maps” of (f
inite dimensional) coalgebras which comes from separable extensions of the
dual algebras. This is a joint work with Miodrag Iovanov\, Emre Sen\, and
Alexander Sistko.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jenny August (Max Plank Institut für Mathematik (MPIM))
DTSTART;VALUE=DATE-TIME:20200917T130000Z
DTEND;VALUE=DATE-TIME:20200917T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/14
DESCRIPTION:Title: Grassmanian categories of infinite rank\nby Jenny August (Max Plan
k Institut für Mathematik (MPIM)) as part of FD Seminar\n\n\nAbstract\nIn
this talk\, I’ll describe our work towards providing an infinite rank v
ersion of the Grassmanian cluster categories introduced by Jensen\, King a
nd Su. We develop a new combinatorial tool for determining when two k-subs
ets of the integers are “non-crossing”\, or equivalently when two Plü
cker coordinates of a Grassmanian cluster algebra of infinite rank are “
compatible”. We use this tool to show that there is a structure preservi
ng bijection between these Plücker coordinates and the generically free m
odules of rank 1 in our Grassmanian category of infinite rank\, mirroring
a result of Jensen\, King and Su in the finite case. This is joint work wi
th Man-Wai Cheung\, Eleonore Faber\, Sira Gratz and Sibylle Schroll.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xiao-Wu Chen (University of Science and Technology of China (USTC)
)
DTSTART;VALUE=DATE-TIME:20200924T130000Z
DTEND;VALUE=DATE-TIME:20200924T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/15
DESCRIPTION:Title: Leavitt path algebras\, B-infty-algebras and Keller’s conjecture for
singular Hochschild cohomology\nby Xiao-Wu Chen (University of Scienc
e and Technology of China (USTC)) as part of FD Seminar\n\n\nAbstract\nI w
ill first recall the relation between Leavitt path algebras and the singul
arity categories of radical-square-zero algebras. Using Leavitt path algeb
ras\, we confirm Keller’s conjecrure for any radical-square-zero algebra
: there is an isomorphism in the homotopy category of $B_\\infty$-algebras
between the Hochschild cochain complex of the dg singularity category and
the singular Hochschild cochain complex of the algebra. Moreover\, we pro
ve that Keller’s conjecture is invariant under one-point (co)extensions
and singular equivalences with levels. This is joint with Huanhuan Li and
Zhengfang Wang.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephen Zito (University of Connecticut)
DTSTART;VALUE=DATE-TIME:20201001T130000Z
DTEND;VALUE=DATE-TIME:20201001T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/16
DESCRIPTION:Title: tau-Tilting Finite Algebras With Non-Empty Left Or Right Parts Are Rep
resentation-Finite\nby Stephen Zito (University of Connecticut) as par
t of FD Seminar\n\n\nAbstract\nτ-tilting theory was introduced by Adachi\
, Iyama and Reiten as a far-reaching generalization of classical tilting t
heory for finite dimensional associative algebras. One of the main classes
of objects in the theory is that of τ\\tauτ-rigid modules: a module MMM
over an algebra Λ\\LambdaΛ is τ\\tauτ-rigid if HomΛ(M\,τM)=0\\op
eratorname{Hom}_{\\Lambda}(M\,\\tau M)=0HomΛ(M\,τM)=0\, where τM\\ta
u MτM denotes the Auslander-Reiten translation of MMM\; such a module MMM
is called τ\\tauτ-tilting if the number ∣M∣|M|∣M∣ of non-isomor
phic indecomposable summands of MMM equals the number of isomorphism class
es of simple Λ\\LambdaΛ-modules. Recently\, a new class of algebras was
introduced by Demonet\, Iyama\, Jasso called τ\\tauτ-tilting finite alge
bras. They are defined as finite dimensional algebras with only a finite n
umber of isomorphism classes of basic τ\\tauτ-tilting modules.\n\nAn obv
ious sufficient condition to be τ\\tauτ-tilting finite is to be represen
tation-finite. In general\, this condition is not necessary. The aim of th
is talk is to show for algebras Λ\\LambdaΛ such that LΛL_\\LambdaLΛ
or RΛ≠∅R_\\Lambda\\neq\\emptysetRΛ=∅ \, representation-f
initeness and τ\\tauτ-tilting finiteness are equivalent conditions.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lidia Angeleri Hügel (Università degli Studi di Verona)
DTSTART;VALUE=DATE-TIME:20201217T140000Z
DTEND;VALUE=DATE-TIME:20201217T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/17
DESCRIPTION:by Lidia Angeleri Hügel (Università degli Studi di Verona) a
s part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fernando Muro (TBC) (Universidad de Sevilla)
DTSTART;VALUE=DATE-TIME:20201210T140000Z
DTEND;VALUE=DATE-TIME:20201210T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/18
DESCRIPTION:by Fernando Muro (TBC) (Universidad de Sevilla) as part of FD
Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vanessa Miemietz (University of East Anglia)
DTSTART;VALUE=DATE-TIME:20201022T130000Z
DTEND;VALUE=DATE-TIME:20201022T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/20
DESCRIPTION:Title: Categorification of representation theory with an application to Soerg
el bimodules\nby Vanessa Miemietz (University of East Anglia) as part
of FD Seminar\n\n\nAbstract\nWe explain how to categorify various basic re
sults from the representation theory of finite-dimensional algebras\, whic
h are useful for classifying simple modules\, to the 2-representation theo
ry of fiat 2-categories. We then apply these in order to obtain a classifi
cation of simple 2-representations of the 2-category of Soergel bimodules.
\n
LOCATION:https://researchseminars.org/talk/fd-seminar/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dmitri Orlov (Steklov Mathematical Institute of Russian Academy of
Sciences)
DTSTART;VALUE=DATE-TIME:20201029T140000Z
DTEND;VALUE=DATE-TIME:20201029T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/21
DESCRIPTION:Title: Finite-dimensional DG algebras and their properties\nby Dmitri Orl
ov (Steklov Mathematical Institute of Russian Academy of Sciences) as part
of FD Seminar\n\n\nAbstract\nThe talk will focus on finite-dimensional DG
algebras and categories of perfect complexes over such DG algebras. These
categories can be considered as proper derived noncommutative schemes. We
are going to discuss basic properties of these noncommutative schemes and
to establish a connection between such categories and DG categories with
(semi)exceptional collections.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mikhail Gorsky (Hausdorff Research Institute for Mathematics (HIM)
)
DTSTART;VALUE=DATE-TIME:20201203T140000Z
DTEND;VALUE=DATE-TIME:20201203T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/22
DESCRIPTION:Title: Exact structures and degeneration of Hall algebras\nby Mikhail Gor
sky (Hausdorff Research Institute for Mathematics (HIM)) as part of FD Sem
inar\n\n\nAbstract\nHall algebras and various related structures play a pr
ominent role in the modern representation theory. I will explain the inter
play between different exact structures on an additive category and degene
rations of the associated Hall algebras. For the categories of representat
ions of Dynkin quivers\, this recovers degenerations of the negative part
of the corresponding quantum group. I will sketch the proofs of our result
s in the general case based on Auslander-Reiten theory. We will discuss fu
rther examples related to quantum doubles of quantum Borel subalgebras and
\, if time permits\, certain generalizations involving extriangulated cate
gories. (Based on joint work with Xin Fang.)\n
LOCATION:https://researchseminars.org/talk/fd-seminar/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matthew Habermann (University College London (UCL))
DTSTART;VALUE=DATE-TIME:20201008T130000Z
DTEND;VALUE=DATE-TIME:20201008T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/23
DESCRIPTION:Title: Homological mirror symmetry for invertible polynomials in two variable
s\nby Matthew Habermann (University College London (UCL)) as part of F
D Seminar\n\n\nAbstract\nThe starting point for homological mirror symmetr
y for invertible polynomials is an n x n invertible matrix with non-negati
ve integer entries. To such a matrix\, as well as to its transpose\, one c
an associate polynomials. These polynomials are called invertible if they
are weighted homogeneous\, and both define isolated singularities at the o
rigin. Homological mirror symmetry for invertible polynomials is a series
of conjectures which posits the equivalence of the different flavours of F
ukaya category associated to the Lefschetz fibration defined by one polyno
mial with various flavours of graded matrix factorisations defined by the
transpose polynomial. Particular to the case of two variables is the fact
that the partially wrapped Fukaya category of a Milnor fibre corresponds t
o the derived category of modules of a gentle algebra\, and so HMS for inv
ertible polynomials in two variables allows one to study the latter catego
ry geometrically. In this talk I will explain my recent work\, part of whi
ch was done jointly with Jack Smith.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joe Grant (University of East Anglia)
DTSTART;VALUE=DATE-TIME:20201015T130000Z
DTEND;VALUE=DATE-TIME:20201015T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/24
DESCRIPTION:Title: Preprojective algebras and fractional Calabi-Yau algebras\nby Joe
Grant (University of East Anglia) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Arne Mertens (Universiteit Antwerpen)
DTSTART;VALUE=DATE-TIME:20201105T140000Z
DTEND;VALUE=DATE-TIME:20201105T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/25
DESCRIPTION:Title: Linear quasi-categories as templicial modules\nby Arne Mertens (Un
iversiteit Antwerpen) as part of FD Seminar\n\n\nAbstract\nThis is joint w
ork with my supervisor Wendy Lowen. After laying out the basics of quasi-c
ategories as defined by Joyal\, we introduce a notion of linear quasi-cate
gories over a unital commutative ring. We make use of certain colax monoid
al functors\, which we call templicial modules\, as a variant of simplicia
l modules respecting the monoidal structure. It turns out that templicial
modules with a Frobenius monoidal structure are equivalent to (homological
ly) non-negatively graded dg-categories. Through this equivalence we can a
ssociate to any dg-category a linear quasi-category\, the linear dg-nerve\
, which enhances the classical dg-nerve.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICRA2020 Research Snapshots
DTSTART;VALUE=DATE-TIME:20201112T140000Z
DTEND;VALUE=DATE-TIME:20201112T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/26
DESCRIPTION:by ICRA2020 Research Snapshots as part of FD Seminar\n\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICRA2020 Research Snapshots
DTSTART;VALUE=DATE-TIME:20201119T140000Z
DTEND;VALUE=DATE-TIME:20201119T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/27
DESCRIPTION:by ICRA2020 Research Snapshots as part of FD Seminar\n\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICRA2020 Research Snapshots
DTSTART;VALUE=DATE-TIME:20201126T140000Z
DTEND;VALUE=DATE-TIME:20201126T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/28
DESCRIPTION:by ICRA2020 Research Snapshots as part of FD Seminar\n\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Henning Krause (Universität Bielefeld)
DTSTART;VALUE=DATE-TIME:20210107T140000Z
DTEND;VALUE=DATE-TIME:20210107T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/29
DESCRIPTION:Title: The category of local representations of a finite group\nby Hennin
g Krause (Universität Bielefeld) as part of FD Seminar\n\n\nAbstract\nWe
consider modular representations of a finite group and focus for each prim
e ideal of the cohomology ring on the stable category of representations s
upported at that prime. This category is tensor triangulated\, but compact
and dualising objects do not coincide. For instance\, the tensor unit is
not compact. This is in contrast to the global category of representations
and leads to an interesting completion of the category of compact objects
. The talk presents recent progress from an ongoing collaboration with Dav
e Benson\, Srikanth Iyengar\, and Julia Pevtsova.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chrysostomos Psaroudakis (Aristotle University of Thessaloniki)
DTSTART;VALUE=DATE-TIME:20210114T140000Z
DTEND;VALUE=DATE-TIME:20210114T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/30
DESCRIPTION:by Chrysostomos Psaroudakis (Aristotle University of Thessalon
iki) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jason Lo (California State University\, Northridge (CSUN))
DTSTART;VALUE=DATE-TIME:20210121T140000Z
DTEND;VALUE=DATE-TIME:20210121T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/31
DESCRIPTION:by Jason Lo (California State University\, Northridge (CSUN))
as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Teresa Conde (Universität Stuttgart)
DTSTART;VALUE=DATE-TIME:20210128T140000Z
DTEND;VALUE=DATE-TIME:20210128T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/32
DESCRIPTION:by Teresa Conde (Universität Stuttgart) as part of FD Seminar
\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Grzegorz Bobiński (Nicolaus Copernicus University)
DTSTART;VALUE=DATE-TIME:20210204T140000Z
DTEND;VALUE=DATE-TIME:20210204T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/33
DESCRIPTION:by Grzegorz Bobiński (Nicolaus Copernicus University) as part
of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Emily Barnard (DePaul University)
DTSTART;VALUE=DATE-TIME:20210211T140000Z
DTEND;VALUE=DATE-TIME:20210211T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/34
DESCRIPTION:by Emily Barnard (DePaul University) as part of FD Seminar\n\n
Abstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hipólito Treffinger (Rheinische Friedrich-Wilhelms-Universität B
onn)
DTSTART;VALUE=DATE-TIME:20210218T140000Z
DTEND;VALUE=DATE-TIME:20210218T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/35
DESCRIPTION:by Hipólito Treffinger (Rheinische Friedrich-Wilhelms-Univers
ität Bonn) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:İlke Çanakçı (Vrije Universiteit Amsterdam)
DTSTART;VALUE=DATE-TIME:20210225T140000Z
DTEND;VALUE=DATE-TIME:20210225T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/36
DESCRIPTION:by İlke Çanakçı (Vrije Universiteit Amsterdam) as part of
FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Javad Asadollahi (University of Isfahan)
DTSTART;VALUE=DATE-TIME:20210304T140000Z
DTEND;VALUE=DATE-TIME:20210304T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/37
DESCRIPTION:by Javad Asadollahi (University of Isfahan) as part of FD Semi
nar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/37/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hans Franzen (Ruhr-Universität Bochum)
DTSTART;VALUE=DATE-TIME:20210311T140000Z
DTEND;VALUE=DATE-TIME:20210311T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/38
DESCRIPTION:by Hans Franzen (Ruhr-Universität Bochum) as part of FD Semin
ar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/38/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vincent Gelinas
DTSTART;VALUE=DATE-TIME:20210318T140000Z
DTEND;VALUE=DATE-TIME:20210318T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/39
DESCRIPTION:by Vincent Gelinas as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/39/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sebastian Eckert (Universität Bielefeld)
DTSTART;VALUE=DATE-TIME:20210325T140000Z
DTEND;VALUE=DATE-TIME:20210325T150000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/40
DESCRIPTION:by Sebastian Eckert (Universität Bielefeld) as part of FD Sem
inar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/40/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jan Šťovíček (Charles University)
DTSTART;VALUE=DATE-TIME:20210401T130000Z
DTEND;VALUE=DATE-TIME:20210401T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/41
DESCRIPTION:by Jan Šťovíček (Charles University) as part of FD Seminar
\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/41/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Agnieszka Bodzenta-Skibińska (University of Warsaw)
DTSTART;VALUE=DATE-TIME:20210415T130000Z
DTEND;VALUE=DATE-TIME:20210415T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/42
DESCRIPTION:Title: Abelian envelopes of exact categories\nby Agnieszka Bodzenta-Skibi
ńska (University of Warsaw) as part of FD Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/42/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zheng Hua (University of Hong Kong)
DTSTART;VALUE=DATE-TIME:20210422T130000Z
DTEND;VALUE=DATE-TIME:20210422T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/43
DESCRIPTION:Title: Cluster categories and rational curves\nby Zheng Hua (University o
f Hong Kong) as part of FD Seminar\n\n\nAbstract\nGiven a semi-simple coll
ection of rational curves on a smooth quasi-projective 3-fold\, its multip
ointed noncommutative deformation is represented by a negatively graded DG
A $\\Gamma$. The finite dimensionality of the cohomology of $\\Gamma$ seem
s to relate to contractibility of the collection of rational curves. For C
Y 3-folds\, $\\Gamma$ is a bimodule 3CY DG algebra. If we further assume c
ontractibility then $H^0\\Gamma$ is isomorphic to the contraction algebra
of Donovan and Wemyss. And the cluster category of $\\Gamma$ is dg-equival
ent to the singularity category of the contracted space. In some sense the
CY algebra $\\Gamma$ links the deformation theory of the exceptional fibr
es and the singularity theory of the contracted space. In this talk I will
present a joint work with Bernhard Keller\, where we prove that the deriv
ed Morita type of the contraction algebra together with a canonical class
in its 0-th Hochschild homology defined via CY structure determines the an
alytic type of the singularity of the contracted space.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/43/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Magdalena Boos (Ruhr-Universität Bochum)
DTSTART;VALUE=DATE-TIME:20210429T130000Z
DTEND;VALUE=DATE-TIME:20210429T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/44
DESCRIPTION:Title: On symmetric quivers and their degenerations\nby Magdalena Boos (R
uhr-Universität Bochum) as part of FD Seminar\n\n\nAbstract\nWe introduce
the notion of a symmetric quiver as provided by Derksen and Weyman in 200
2 and discuss symmetric degenerations in this context (which correspond to
orbit closure relations in the symmetric representation variety). After m
otivating our particular interest in the latter by presenting connections
to group actions in algebraic Lie Theory\, we explain our main questions:
are symmetric degenerations induced by “usual” degenerations in the re
presentation variety of the underlying quiver? We look at (counter)example
s and recent results.\n\nThis is joint work with G. Cerulli Irelli and F.
Esposito.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/44/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Osamu Iyama (The University of Tokyo)
DTSTART;VALUE=DATE-TIME:20210513T130000Z
DTEND;VALUE=DATE-TIME:20210513T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/45
DESCRIPTION:Title: Periodic trivial extension algebras and fractionally Calabi-Yau algebr
as\nby Osamu Iyama (The University of Tokyo) as part of FD Seminar\n\n
\nAbstract\nWe study periodicity and twisted periodicity of the trivial ex
tension algebra T(A) of a finite-dimensional algebra A. We prove that (twi
sted) periodicity of the trivial extension is equivalent to A being (twist
ed) fractionally Calabi–Yau. Moreover\, twisted periodicity of T(A) is e
quivalent to the d-representation-finiteness of the r-fold trivial extensi
on algebra Tr(A) for some positive integers r and d. These results allow u
s to construct a large number of new examples of periodic as well as fract
ionally Calabi–Yau algebras\, and give answers to several open questions
. This is a joint work with Aaron Chan\, Erik Darpö and René Marczinzik.
\n
LOCATION:https://researchseminars.org/talk/fd-seminar/45/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gordana Todorov (Northeastern University)
DTSTART;VALUE=DATE-TIME:20210603T130000Z
DTEND;VALUE=DATE-TIME:20210603T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/46
DESCRIPTION:Title: Cluster Structures and Cluster Theories\nby Gordana Todorov (North
eastern University) as part of FD Seminar\n\n\nAbstract\n(Joint work with
Kiyoshi Igusa and Job D. Rock)\n\nI will discuss continuous cluster catego
ries\, generalizations of those\, cluster structures\, examples when only
conditions for “cluster theories”\, but not “cluster structures” (
in the sense of BIRS) are satisfied. Also relations between various cluste
r theories will be stated (some known\, some naturally expected).\n
LOCATION:https://researchseminars.org/talk/fd-seminar/46/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vincent Gelinas
DTSTART;VALUE=DATE-TIME:20210610T130000Z
DTEND;VALUE=DATE-TIME:20210610T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/47
DESCRIPTION:Title: Some invariants related to the finitistic dimension\nby Vincent Ge
linas as part of FD Seminar\n\n\nAbstract\nThe finitistic dimension of Art
in algebras is notoriously hard to understand. In this talk\, we’ll disc
uss an attempt to pin it down in terms of a new invariant\, defined more g
enerally over sufficiently nice Noetherian rings. Originally meant to mode
l the finitistic dimension of Iwanaga-Gorenstein rings\, it unexpectedly a
lso gave the correct answer for commutative local Noetherian rings\, Artin
algebras of radical square zero\, and (due to recent results of Ringel an
d Sen) Nakayama algebras. Given time\, we’ll also discuss links with the
notion of “finitistic” Auslander algebras recently introduced by Marc
zinzik.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/47/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Brüstle (Université de Sherbrooke)
DTSTART;VALUE=DATE-TIME:20210617T130000Z
DTEND;VALUE=DATE-TIME:20210617T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/48
DESCRIPTION:Title: On length functions for an exact category\nby Thomas Brüstle (Uni
versité de Sherbrooke) as part of FD Seminar\n\nView-only livestream: htt
ps://www.fd-seminar.xyz/live/\n\nAbstract\nThe notion of an exact category
has been introduced by Quillen to axiomatize homological properties of ab
elian categories. It allows to define and study homological properties of
an exact category\, and to define its derived category. However\, it turns
out that the fundamental concept of length\, as known for modules\, is le
ss suitable to be studied in the context of an exact category. We aim in t
his talk to present some recent developments showing for which kind of exa
ct categories an analogue of the Jordan-Hölder property holds\, and what
one can expect from the notion of length in general. We also present resul
ts on the lattice structure of the set of all exact structures that can be
attached to a fixed additive category.\n\nSome of the presented results a
re joint work with Rose-Line Baillargeon\, Mikhail Gorsky\, Souheila Hasso
un and Aran Tattar.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/48/
URL:https://www.fd-seminar.xyz/live/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Merlin Christ (Universität Hamburg)
DTSTART;VALUE=DATE-TIME:20210722T130000Z
DTEND;VALUE=DATE-TIME:20210722T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/49
DESCRIPTION:by Merlin Christ (Universität Hamburg) as part of FD Seminar\
n\nView-only livestream: https://www.fd-seminar.xyz/live/\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/49/
URL:https://www.fd-seminar.xyz/live/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Van Nguyen (United States Naval Academy)
DTSTART;VALUE=DATE-TIME:20210506T130000Z
DTEND;VALUE=DATE-TIME:20210506T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/50
DESCRIPTION:Title: Quantum symmetries through the lens of linear algebra\nby Van Nguy
en (United States Naval Academy) as part of FD Seminar\n\n\nAbstract\nThe
McKay matrix $M_V$ records the result of tensoring the simple modules with
a finite-dimensional module $V$. In the case of finite groups\, the eigen
vectors for $M_V$ are the columns of the character table\, and the eigenva
lues come from evaluating the character of $V$ on conjugacy class represen
tatives.\n\nIn this talk\, we will explore what can be said about such eig
envectors when the McKay matrix is determined by modules over an arbitrary
finite-dimensional Hopf algebra $H$. Here\, the McKay matrix \n$M_V$ enco
des quantum symmetries coming from the actions of $H$. We prove general re
sults about $M_V$ by using the coproduct and the characters of simple and
projective $H$-modules\, and also obtain results for a different matrix th
at encodes the fusion rules for Hopf algebra $H$. We illustrate these resu
lts for the small quantum group $u_q(\\mathfrak{sl}_2)$\, where $q$ is a r
oot of unity (and generally for the Drinfeld double $D_n$ of the Taft alge
bra). In these examples\, the eigenvalues and eigenvectors for these matri
ces can be described in terms of several kinds of Chebyshev polynomials.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/50/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Martin Kalck
DTSTART;VALUE=DATE-TIME:20210624T130000Z
DTEND;VALUE=DATE-TIME:20210624T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/51
DESCRIPTION:Title: A surface and a threefold with equivalent singularity categories\n
by Martin Kalck as part of FD Seminar\n\nView-only livestream: https://www
.fd-seminar.xyz/live/\n\nAbstract\nWe start with an introduction to singul
arity categories and equivalences between them. In particular\, we recall
known results about singular equivalences between commutative rings\, whic
h go back to Knörrer\, Yang\, Kawamata and a joint work with Karmazyn. Th
en we explain a new singular equivalence between an affine surface and an
affine threefold. This seems to be the first (non-trivial) example of a si
ngular equivalence involving rings of even and odd Krull dimension.\n
LOCATION:https://researchseminars.org/talk/fd-seminar/51/
URL:https://www.fd-seminar.xyz/live/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Khrystyna Serhiyenko (University of Kentucky)
DTSTART;VALUE=DATE-TIME:20210715T130000Z
DTEND;VALUE=DATE-TIME:20210715T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/52
DESCRIPTION:by Khrystyna Serhiyenko (University of Kentucky) as part of FD
Seminar\n\nView-only livestream: https://www.fd-seminar.xyz/live/\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/52/
URL:https://www.fd-seminar.xyz/live/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Jørgensen (Aarhus University)
DTSTART;VALUE=DATE-TIME:20210729T130000Z
DTEND;VALUE=DATE-TIME:20210729T140000Z
DTSTAMP;VALUE=DATE-TIME:20210612T231336Z
UID:fd-seminar/53
DESCRIPTION:by Peter Jørgensen (Aarhus University) as part of FD Seminar\
n\nView-only livestream: https://www.fd-seminar.xyz/live/\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/fd-seminar/53/
URL:https://www.fd-seminar.xyz/live/
END:VEVENT
END:VCALENDAR