BEGIN:VCALENDAR
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BEGIN:VEVENT
SUMMARY:Rosa Winter (Leiden University)
DTSTART;VALUE=DATE-TIME:20200414T150000Z
DTEND;VALUE=DATE-TIME:20200414T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/1
DESCRIPTION:Title: Rat
ional points on del Pezzo surfaces of degree 1\nby Rosa Winter (Leiden
University) as part of Max Planck Institute nonlinear algebra seminar\n\n
\nAbstract\nDel Pezzo surfaces are classified by their degree\, an integer
between 1 and 9. Famous examples are those of degree 3\, which are cubic
surfaces in đ3. In this talk I will focus on del Pezzo surfaces of degr
ee 1. After briefly describing their geometry\, I will talk about the set
of Q-valued (rational) points on such a surface. I will show what is known
about this set so far\, and which questions are still open.\n
LOCATION:https://researchseminars.org/talk/NASO/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yulia Alexandr (University of California at Berkeley)
DTSTART;VALUE=DATE-TIME:20200414T154000Z
DTEND;VALUE=DATE-TIME:20200414T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/2
DESCRIPTION:Title: Log
arithmic Voronoi cells\nby Yulia Alexandr (University of California at
Berkeley) as part of Max Planck Institute nonlinear algebra seminar\n\nAb
stract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Balazs Szendroi (University of Oxford)
DTSTART;VALUE=DATE-TIME:20200414T162000Z
DTEND;VALUE=DATE-TIME:20200414T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/3
DESCRIPTION:Title: The
punctual Hilbert scheme of 4 points in affine 3-space\nby Balazs Szen
droi (University of Oxford) as part of Max Planck Institute nonlinear alge
bra seminar\n\n\nAbstract\nThe $n$-th punctual Hilbert scheme $\\operatorn
ame{Hilb}^n_0(\\mathbb{A}^d)$ of points of affine $d$-space parametrises i
deals of finite co-length $n$ of the ring of functions on $d$-dimensional
affine space\, whose radical is the maximal ideal at the origin (equivalen
tly\, subschemes of length $n$ with support at the origin). A classical th
eorem of Briancon claims the irreducibility of this space for $d=2$ and ar
bitrary $n$. The case of a small number of points being straightforward\,
the first nontrivial case is the case of $4$ points in $3$-space. We show\
, answering a question of Sturmfels\, that over the complex numbers $\\ope
ratorname{Hilb}^4_0(\\mathbb{A}^3)$ is irreducible. We use a combination o
f arguments from computer algebra and representation theory.\n
LOCATION:https://researchseminars.org/talk/NASO/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lisa Nicklasson (Stockholm University)
DTSTART;VALUE=DATE-TIME:20200416T150000Z
DTEND;VALUE=DATE-TIME:20200416T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/4
DESCRIPTION:Title: Sub
algebras of a polynomial ring with minimal Hilbert function\nby Lisa N
icklasson (Stockholm University) as part of Max Planck Institute nonlinear
algebra seminar\n\n\nAbstract\nIn a recent paper by Boij and Conca the up
per and lower bounds for the Hilbert function of subalgebras of a polynomi
al ring are discussed. In this talk we will study subalgebras generated in
degree two with minimal Hilbert function. These subalgebras are generated
by strongly stable sets of monomials. To minimize the Hilbert function we
want to firstly minimize the numbers of variables\, and secondly the mult
iplicity of the algebra. This boils down to a purely combinatorial problem
\, as the multiplicity can be computed by counting the number of maximal n
orth-east lattice paths in an diagram representing the strongly stable set
.\n
LOCATION:https://researchseminars.org/talk/NASO/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tara Fife (Louisiana State University)
DTSTART;VALUE=DATE-TIME:20200416T154000Z
DTEND;VALUE=DATE-TIME:20200416T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/5
DESCRIPTION:Title: A f
riendly Introduction to matroids\nby Tara Fife (Louisiana State Univer
sity) as part of Max Planck Institute nonlinear algebra seminar\n\n\nAbstr
act\nMatroids were introduced by Whitney in 1935 to provide an abstract ge
neralization of the notion of linear independence. Whitney noted that matr
oids arise naturally from graphs and from matrices. More recently\, people
have discovered ties to matroid theory and algebraic geometry. In this ta
lk\, I will first introduce matroid theory\, along with some key examples\
, and central questions. I will then discuss connections between matroid t
heory and nonlinear algebra.\n
LOCATION:https://researchseminars.org/talk/NASO/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JosĂ© Samper (MPI MIS\, Leipzig)
DTSTART;VALUE=DATE-TIME:20200416T162000Z
DTEND;VALUE=DATE-TIME:20200416T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/6
DESCRIPTION:Title: Som
e shelling orders are better than others\nby JosĂ© Samper (MPI MIS\, L
eipzig) as part of Max Planck Institute nonlinear algebra seminar\n\n\nAbs
tract\nA shelling order is a recursive way of constructing a polyhedral co
mplex that helps to understand several topological\, algebraic and combina
torial invariants. Consequently\, a significant amount of effort has been
put into developing techniques to determine if a given complex has a shell
ing order. In this talk we will explore a different point of view that is
less popular: for a complex that admits many shelling orders\, a good choi
ce of the shelling order can can make a significant difference. We address
this problem for matroid independence complexes\, present an intriguing c
onnection with shelling orders of polytopes\, and discuss some experiments
aimed at better understanding some old problems. This is based on joint w
ork Alex Heaton.\n
LOCATION:https://researchseminars.org/talk/NASO/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anna Seigal (University of Oxford)
DTSTART;VALUE=DATE-TIME:20200421T150000Z
DTEND;VALUE=DATE-TIME:20200421T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/7
DESCRIPTION:Title: Tor
us actions and maximum likelihood estimation\nby Anna Seigal (Universi
ty of Oxford) as part of Max Planck Institute nonlinear algebra seminar\n\
n\nAbstract\nWe describe connections between invariant theory and maximum
likelihood estimation\, in the context of log-linear models. Finding a max
imum likelihood estimate (MLE) is an optimisation problem over a statistic
al model\, to obtain the point that best fits observed data. We show that
this is equivalent to a capacity problem - finding the point of minimal no
rm in an orbit under a corresponding torus action. The existence of the ML
E can then be characterized by stability under the action. Moreover\, algo
rithms from statistics can be used in invariant theory\, and vice versa. B
ased on joint work with Carlos AmĂ©ndola\, KathlĂ©n Kohn and Philipp Reich
enbach. This is part one of a two part talk: in the second part\, Philipp
Reichenbach will discuss our results for multivariate Gaussian models.\n
LOCATION:https://researchseminars.org/talk/NASO/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Philipp Reichenbach (Technical University Berlin)
DTSTART;VALUE=DATE-TIME:20200421T154000Z
DTEND;VALUE=DATE-TIME:20200421T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/8
DESCRIPTION:Title: Inv
ariant Theory and Matrix Normal Models\nby Philipp Reichenbach (Techni
cal University Berlin) as part of Max Planck Institute nonlinear algebra s
eminar\n\n\nAbstract\nWe describe connections between invariant theory and
maximum likelihood estimation (ML estimation)\, in the context of matrix
normal models. Namely\, we link ML estimation in that case to the left rig
ht action of SLxSL on tuples of matrices. This enables us to characterize
ML estimation by stability under that group action. Furthermore\, invarian
t theory provides a new upper bound on the sample size for generic bounded
ness of the log-likelihood function. To illuminate the theory the talk put
s emphasis on several examples. At the end we briefly outline how our resu
lts generalize to Gaussian group models.\n\nBased on joint work with Carlo
s AmĂ©ndola\, KathlĂ©n Kohn and Anna Seigal. This is the second part of a
two part talk: in the first part\, Anna Seigal will discuss our results fo
r log-linear models.\n
LOCATION:https://researchseminars.org/talk/NASO/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aida Maraj (University of Kentucky)
DTSTART;VALUE=DATE-TIME:20200421T162000Z
DTEND;VALUE=DATE-TIME:20200421T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/9
DESCRIPTION:Title: The
Equivariant Hilbert Series of Hierarchical Models\nby Aida Maraj (Uni
versity of Kentucky) as part of Max Planck Institute nonlinear algebra sem
inar\n\n\nAbstract\nA hierarchical model is realizable by a simplicial com
plex that describes the dependency relationships among random variables an
d the number of states of each random variable. Diaconis and Sturmfels hav
e constructed toric ideals that provide useful information about the model
. This talk concerns quantitative properties for families of ideals arisin
g from hierarchical models with the same dependency relations and varying
number of states. We introduce and study invariant filtrations of such ide
als\, and their equivariant Hilbert series. A condition that guarantees th
is multivariate series is a rational function will be presented. The key i
s to construct finite automata that recognize languages corresponding to i
nvariant filtrations. Lastly\, we show that one can similarly prove the ra
tionality of an equivariant Hilbert series for some filtrations of algebra
s. This is joint work with Uwe Nagel.\n
LOCATION:https://researchseminars.org/talk/NASO/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Ruddy (MPI MIS\, Leipzig)
DTSTART;VALUE=DATE-TIME:20200423T150000Z
DTEND;VALUE=DATE-TIME:20200423T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/10
DESCRIPTION:Title: Eq
uivalence classes of planar algebraic curves through numerical algebraic g
eometry\nby Michael Ruddy (MPI MIS\, Leipzig) as part of Max Planck In
stitute nonlinear algebra seminar\n\n\nAbstract\nFor the action of a group
on the plane\, the group equivalence problem for curves can be stated as:
given two curves\, decide if they are related by an element of the group.
We describe an efficient equality test\, using tools from numerical algeb
raic geometry\, to determine (with âprobability-oneâ) whether or not t
wo rational maps have the same image up to Zariski closure. Using signatur
e maps\, constructed from differential and joint invariants\, we apply thi
s test to solve the group equivalence problem for algebraic curves under t
he linear action of algebraic groups. In this talk I will discuss the equa
lity test and signature maps for algebraic curves\, focusing on the action
of the complex Euclidean group for our computations and examples. I will
present some of our results comparing the sensitivity of different signatu
re maps. This is based on joint work with Tim Duff.\n
LOCATION:https://researchseminars.org/talk/NASO/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Laura Brustenga i Moncusi (University of Copenhagen)
DTSTART;VALUE=DATE-TIME:20200423T154000Z
DTEND;VALUE=DATE-TIME:20200423T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/11
DESCRIPTION:Title: Re
action networks and toric systems\nby Laura Brustenga i Moncusi (Unive
rsity of Copenhagen) as part of Max Planck Institute nonlinear algebra sem
inar\n\n\nAbstract\nMass-action networks (edge labelled directed graphs) m
odel cascades of chemical reactions (e.g. used by biological systems for a
dapting to the environment). From the assumption of mass-action kinetics\,
a mass-action network gives rise to a polynomial dynamical system. In thi
s large class of polynomial systems\, the intuition from Chemistry and Alg
ebraic Geometry feed themselves\, giving exciting new results. For example
\, we will discuss complex balanced mass-action networks\, which have a na
tural chemical interpretation and (conjecturally) completely determines th
e dynamics of the associated systems (called toric dynamical systems). We
will introduce âdisguised toric systemsâ\, which exploit this relation
ship the other way around: given a dynamical system\, can we build a compl
ex balanced mass-action network for it?\n\n(Joint work with Gheorghe Craci
un and Miruna-Ćtefana Sorea).\n
LOCATION:https://researchseminars.org/talk/NASO/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Taylor Brysiewicz (Texas A&M)
DTSTART;VALUE=DATE-TIME:20200423T162000Z
DTEND;VALUE=DATE-TIME:20200423T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/12
DESCRIPTION:Title: So
lving decomposable sparse systems\nby Taylor Brysiewicz (Texas A&M) as
part of Max Planck Institute nonlinear algebra seminar\n\n\nAbstract\nAme
ndola et al. proposed a method for solving systems of polynomial equations
lying in a family which exploits a recursive decomposition into smaller s
ystems. A family of systems admits such a decomposition if and only if the
corresponding monodromy group is imprimitive. A consequence of Esterovâ
s classification of sparse polynomial systems with imprimitive monodromy g
roups is that this decomposition is obtained by inspection. Using these id
eas\, we present a recursive algorithm to numerically solve decomposable s
parse systems. This is joint work with Frank Sottile\, Jose Rodriguez\, an
d Thomas Yahl.\n
LOCATION:https://researchseminars.org/talk/NASO/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sascha Timme (Technical University Berlin)
DTSTART;VALUE=DATE-TIME:20200430T150000Z
DTEND;VALUE=DATE-TIME:20200430T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/13
DESCRIPTION:Title: 32
64 Conics in a Second\nby Sascha Timme (Technical University Berlin) a
s part of Max Planck Institute nonlinear algebra seminar\n\n\nAbstract\nEn
umerative algebraic geometry counts the solutions to certain geometric con
straints. Numerical algebraic geometry determines these solutions for any
given instance. In this talk I want to illustrate how these two fields com
plement each other. The focus lies on the 3264 conics that are tangent to
five given conics in the plane. I will illustrate tools and techniques use
d in numerical algebraic geometry and how we used these to find a fully re
al instance of this classic problem.\n\nThis is joint work with P. Breidin
g and B. Sturmfels.\n
LOCATION:https://researchseminars.org/talk/NASO/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Louis Theran (University of St. Andrews)
DTSTART;VALUE=DATE-TIME:20200409T154000Z
DTEND;VALUE=DATE-TIME:20200409T162000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/14
DESCRIPTION:Title: Gr
aph rigidity and measurement varieties\nby Louis Theran (University of
St. Andrews) as part of Max Planck Institute nonlinear algebra seminar\n\
n\nAbstract\nGeometric rigidity theory is concerned with how much informat
ion about a configuration p of n points in a d-dimensional Euclidean space
is determined by pairwise Euclidean distance measurements\, indexed by th
e edges of a graph G with n vertices. One can turn this around\, and\, def
ine\, for a fixed graph G\, a âmeasurement variety" associated with all
possible edge lengths measurements as the configuration varies. Iâll sur
vey some (somewhat) recent results in geometric rigidity obtained by study
ing the geometry of measurement varieties.\n
LOCATION:https://researchseminars.org/talk/NASO/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eugenie Hunsicker (Loughborough University)
DTSTART;VALUE=DATE-TIME:20200409T162000Z
DTEND;VALUE=DATE-TIME:20200409T170000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/15
DESCRIPTION:Title: Ar
chitecture for the Working Mathematician\nby Eugenie Hunsicker (Loughb
orough University) as part of Max Planck Institute nonlinear algebra semin
ar\n\n\nAbstract\nDel Pezzo surfaces are classified by their degree\, an i
nteger between 1 and 9. Famous examples are those of degree 3\, which are
cubic surfaces in $P ^ 3$. In this talk I will focus on del Pezzo surfaces
of degree 1. After briefly describing their geometry\, I will talk about
the set of Q-valued (rational) points on such a surface. I will show what
is known about this set so far\, and which questions are still open.\n
LOCATION:https://researchseminars.org/talk/NASO/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joscha Diehl (UniversitĂ€t Greifswald)
DTSTART;VALUE=DATE-TIME:20200428T150000Z
DTEND;VALUE=DATE-TIME:20200428T153000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/16
DESCRIPTION:Title: Ti
me warping invariants and quasisymmetric functions\nby Joscha Diehl (U
niversitĂ€t Greifswald) as part of Max Planck Institute nonlinear algebra
seminar\n\n\nAbstract\nThe analysis of time series is a standard task in d
ata science. Usually\, as a first step\, features of a time series must be
extracted that characterize the series\, maybe modulo irrelevant (dependi
ng on the application) group actions on the original data. In this talk I
will discuss the action of time-warping: the features should be invariant
to the speed at which the time-series is run through. This leads\, as we s
how\, to quasisymmetric functions\, and I discuss their Hopf algebraic set
up.\n
LOCATION:https://researchseminars.org/talk/NASO/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Arthur Bik (UniversitĂ€t Bern)
DTSTART;VALUE=DATE-TIME:20200428T154000Z
DTEND;VALUE=DATE-TIME:20200428T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/17
DESCRIPTION:Title: Po
lynomial functors as affine spaces\nby Arthur Bik (UniversitĂ€t Bern)
as part of Max Planck Institute nonlinear algebra seminar\n\n\nAbstract\nP
olynomial functors are like spaces of objects (e.g. k-way tensors) without
fixed size and come with an action of (products of) general linear groups
. The aim of this talk is to answer the following question: what happens w
hen you replace vector spaces by polynomial functors when defining affine
spaces?\n\nI will define polynomial functors\, the maps between them and t
heir Zariski-closed subsets and give examples of these things. Then\, I wi
ll discuss how to extend some of the basic results from affine algebraic g
eometry to this setting. This is joint work with Jan Draisma\, Rob Eggermo
nt and Andrew Snowden.\n
LOCATION:https://researchseminars.org/talk/NASO/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lukas KĂŒhne (The Hebrew University of Jerusalem)
DTSTART;VALUE=DATE-TIME:20200428T162000Z
DTEND;VALUE=DATE-TIME:20200428T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/18
DESCRIPTION:Title: Ge
neralised Matroid Representations: Universality and Decidability\nby L
ukas KĂŒhne (The Hebrew University of Jerusalem) as part of Max Planck Ins
titute nonlinear algebra seminar\n\n\nAbstract\nA matroid is a combinatori
al object based on an abstraction of linear independence in vector spaces
and forests in graphs. It is a classical question to determine whether a g
iven matroid is representable as a vector configuration over a field. Such
a matroid is called linear.\n\nThis talk addresses generalisations of suc
h representations over division rings or matrix rings which are called ske
w linear and multilinear matroids respectively.We will describe a generali
sed Dowling geometry that encodes non commutative equations in matroids. T
his construction allows us to reduce word problem instances to skew linear
or multilinear matroid representations.\n\nThe talk is based on joint wor
k with Rudi Pendavingh and Geva Yashfe.\n
LOCATION:https://researchseminars.org/talk/NASO/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Frank Sottile (Texas A&M University)
DTSTART;VALUE=DATE-TIME:20200430T154000Z
DTEND;VALUE=DATE-TIME:20200430T161000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/19
DESCRIPTION:Title: Ga
lois groups in Enumerative Geometry and Applications\nby Frank Sottile
(Texas A&M University) as part of Max Planck Institute nonlinear algebra
seminar\n\n\nAbstract\nIn 1870 Jordan explained how Galois theory can be a
pplied to problems from enumerative geometry\, with the group encoding int
rinsic structure of the problem. Earlier Hermite showed the equivalence of
Galois groups with geometric monodromy groups\, and in 1979 Harris initia
ted the modern study of Galois groups of enumerative problems. He posited
that a Galois group should be âas large as possibleâ in that it will b
e the largest group preserving internal symmetry in the geometric problem.
\n\nI will describe this background and discuss some work in a long-term p
roject to compute\, study\, and use Galois groups of geometric problems\,
including those that arise in applications of algebraic geometry. A main f
ocus is to understand Galois groups in the Schubert calculus\, a well-unde
rstood class of geometric problems that has long served as a laboratory fo
r testing new ideas in enumerative geometry.\n
LOCATION:https://researchseminars.org/talk/NASO/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Khazhgali Kozhasov (Technical University Braunschweig)
DTSTART;VALUE=DATE-TIME:20200430T162000Z
DTEND;VALUE=DATE-TIME:20200430T165000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/20
DESCRIPTION:Title: On
Minimality of Determinantal Varieties\nby Khazhgali Kozhasov (Technic
al University Braunschweig) as part of Max Planck Institute nonlinear alge
bra seminar\n\n\nAbstract\nMinimal submanifolds are mathematical abstracti
ons of soap films: they minimize the Riemannian volume locally around ever
y point. Finding minimal algebraic hypersurfaces in đ
đ for each n is
a long-standing open problem posed by Hsiang. In 2010 Tkachev gave a part
ial solution to this problem showing that the hypersurface of n x n real m
atrices of corank one is minimal. I will discuss the following generalizat
ion of this fact to all determinantal matrix varieties: for any m\, n and
rCo
nnectivity of tropical varieties\nby Diane Maclagan (University of War
wick) as part of Max Planck Institute nonlinear algebra seminar\n\nAbstrac
t: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joachim Jelisiejew (University of Warsaw)
DTSTART;VALUE=DATE-TIME:20200519T150000Z
DTEND;VALUE=DATE-TIME:20200519T160000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/22
DESCRIPTION:Title: Ad
ditive group actions\, formal solutions to PDEs and Bialynicki-Birula deco
mposition\nby Joachim Jelisiejew (University of Warsaw) as part of Max
Planck Institute nonlinear algebra seminar\n\n\nAbstract\nLet $X$ be a sm
ooth projective variety over $\\mathbb{C}$ with an action of $(\\mathbb{C}
\, +)$. Assume that $X$ has a unique fixed point $x_0$. Carrellâs conjec
ture predicts that $X$ is rational. Restriction of orbits to germs at $x_0
$ reduces this conjecture to describing solutions of certain systems of PD
E in the formal power series ring $k[[t]]$ with $d(t) = -t^2$. This sugges
ts a stronger form of the conjecture: $X$ is a union of affine spaces. Thi
s strengthening would give an analogue of Bialynicki-Birula decomposition
for $(\\mathbb{C}\, +)$.\nIn the talk I will explain the beautiful basics
on how the $(\\mathbb{C}\, +)$-actions\, differential equations and ration
ality intertwine and then present the state of the art on the conjecture.
This is a work in progress\, comments and suggestions are welcome!\n
LOCATION:https://researchseminars.org/talk/NASO/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christian Ikenmeyer (University of Liverpool)
DTSTART;VALUE=DATE-TIME:20200526T150000Z
DTEND;VALUE=DATE-TIME:20200526T160000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/23
DESCRIPTION:Title: Gr
oup varieties of polynomials and computational complexity\nby Christia
n Ikenmeyer (University of Liverpool) as part of Max Planck Institute nonl
inear algebra seminar\n\n\nAbstract\nMany varieties of polynomials carry a
canonical action of the general linear group. This talk gives an introduc
tion on how representation theory can be used in the study of the equation
s of such varieties. We then focus on recent research in geometric complex
ity theory on continuant orbit closures and plethysm coefficients.\n
LOCATION:https://researchseminars.org/talk/NASO/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Laurent Manivel (Paul Sabatier University)
DTSTART;VALUE=DATE-TIME:20200616T150000Z
DTEND;VALUE=DATE-TIME:20200616T160000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/24
DESCRIPTION:Title: Or
bital Degeneracy Loci\nby Laurent Manivel (Paul Sabatier University) a
s part of Max Planck Institute nonlinear algebra seminar\n\nAbstract: TBA\
n
LOCATION:https://researchseminars.org/talk/NASO/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tim Seynnaeve (Max Planck Institute for Mathematics in the Science
s)
DTSTART;VALUE=DATE-TIME:20200602T150000Z
DTEND;VALUE=DATE-TIME:20200602T160000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/25
DESCRIPTION:Title: Co
mplete quadrics and algebraic statistics\nby Tim Seynnaeve (Max Planck
Institute for Mathematics in the Sciences) as part of Max Planck Institut
e nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessandra Bernardi (UniversitĂ di Trento)
DTSTART;VALUE=DATE-TIME:20200609T150000Z
DTEND;VALUE=DATE-TIME:20200609T160000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/26
DESCRIPTION:Title: Al
gorithms for polynomial decompositions\nby Alessandra Bernardi (Univer
sitĂ di Trento) as part of Max Planck Institute nonlinear algebra seminar
\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Amy Huang (Texas A&M University)
DTSTART;VALUE=DATE-TIME:20200623T150000Z
DTEND;VALUE=DATE-TIME:20200623T155000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/27
DESCRIPTION:Title: Va
nishing Hessian and Wild Polynomials\nby Amy Huang (Texas A&M Universi
ty) as part of Max Planck Institute nonlinear algebra seminar\n\nAbstract:
TBA\n
LOCATION:https://researchseminars.org/talk/NASO/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Henrik Eisenmann (Max Planck Institute for Mathematics in the Scie
nces)
DTSTART;VALUE=DATE-TIME:20200630T150000Z
DTEND;VALUE=DATE-TIME:20200630T155000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/28
DESCRIPTION:Title: Us
ing an alternating approach to solve two-parameter eigenvalue problems
\nby Henrik Eisenmann (Max Planck Institute for Mathematics in the Science
s) as part of Max Planck Institute nonlinear algebra seminar\n\nAbstract:
TBA\n
LOCATION:https://researchseminars.org/talk/NASO/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rosa Winter (Max Planck Institute for Mathematics in the Sciences)
DTSTART;VALUE=DATE-TIME:20210202T160000Z
DTEND;VALUE=DATE-TIME:20210202T164500Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/29
DESCRIPTION:Title: Li
near spaces of symmetric matrices with non-maximal maximum likelihood degr
ee\nby Rosa Winter (Max Planck Institute for Mathematics in the Scienc
es) as part of Max Planck Institute nonlinear algebra seminar\n\nAbstract:
TBA\n
LOCATION:https://researchseminars.org/talk/NASO/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Juliette Bruce (University of California\, Berkeley)
DTSTART;VALUE=DATE-TIME:20210202T164500Z
DTEND;VALUE=DATE-TIME:20210202T173000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/30
DESCRIPTION:Title: Th
e top weight cohomology of Ag\nby Juliette Bruce (University of Califo
rnia\, Berkeley) as part of Max Planck Institute nonlinear algebra seminar
\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Luca Sodomaco (Aalto University)
DTSTART;VALUE=DATE-TIME:20210216T160000Z
DTEND;VALUE=DATE-TIME:20210216T164500Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/31
DESCRIPTION:Title: As
ymptotics of degrees and ED degrees of Segre products\nby Luca Sodomac
o (Aalto University) as part of Max Planck Institute nonlinear algebra sem
inar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elizabeth Gross (University of Hawai`i at MÄnoa)
DTSTART;VALUE=DATE-TIME:20210216T164500Z
DTEND;VALUE=DATE-TIME:20210216T173000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/32
DESCRIPTION:Title: Wh
en do two networks have the same steady-state ideal?\nby Elizabeth Gro
ss (University of Hawai`i at MÄnoa) as part of Max Planck Institute nonli
near algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aldo Conca (UniversitĂ di Genova)
DTSTART;VALUE=DATE-TIME:20210223T160000Z
DTEND;VALUE=DATE-TIME:20210223T164500Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/33
DESCRIPTION:by Aldo Conca (UniversitĂ di Genova) as part of Max Planck In
stitute nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mauricio Velasco (Universidad de los Andes\, BogotĂĄ)
DTSTART;VALUE=DATE-TIME:20210223T164500Z
DTEND;VALUE=DATE-TIME:20210223T173000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/34
DESCRIPTION:by Mauricio Velasco (Universidad de los Andes\, BogotĂĄ) as pa
rt of Max Planck Institute nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gleb Pogudin (Ăcole polytechnique Paris)
DTSTART;VALUE=DATE-TIME:20210302T160000Z
DTEND;VALUE=DATE-TIME:20210302T164500Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/35
DESCRIPTION:by Gleb Pogudin (Ăcole polytechnique Paris) as part of Max Pl
anck Institute nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alicia Dickenstein (Universidad de Buenos Aires)
DTSTART;VALUE=DATE-TIME:20210302T164500Z
DTEND;VALUE=DATE-TIME:20210302T173000Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/36
DESCRIPTION:Title: Op
timal Descartes rule of signs for polynomial systems supported on circuits
\nby Alicia Dickenstein (Universidad de Buenos Aires) as part of Max P
lanck Institute nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Liam Solus (KTH Royal Institute of Technology)
DTSTART;VALUE=DATE-TIME:20210316T160000Z
DTEND;VALUE=DATE-TIME:20210316T164500Z
DTSTAMP;VALUE=DATE-TIME:20210228T111752Z
UID:NASO/38
DESCRIPTION:by Liam Solus (KTH Royal Institute of Technology) as part of M
ax Planck Institute nonlinear algebra seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/NASO/38/
END:VEVENT
END:VCALENDAR