BEGIN:VCALENDAR
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PRODID:researchseminars.org
CALSCALE:GREGORIAN
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BEGIN:VEVENT
SUMMARY:Francesca Arici (Universiteit Leiden)
DTSTART:20200514T150000Z
DTEND:20200514T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/1/">A
 n introduction to Cuntz--Pimsner algebras</a>\nby Francesca Arici (Univers
 iteit Leiden) as part of UK Virtual operator algebras seminar\n\n\nAbstrac
 t\nIn 1997 Pimsner described how to construct two universal C*-algebras as
 sociated with an injective C*-correspondence\, now known as the Toeplitz--
 Pimsner and Cuntz--Pimsner algebras. In this talk I will recall their cons
 truction\, focusing for simplicity on the case of a finitely generated pro
 jective correspondence. I will describe the associated six-term exact sequ
 ence in K(K)-theory and explain how these can be used in practice for comp
 utational purposes. Finally\, I will describe how\, in the case of a self-
 Morita equivalence\, these exact sequences can be interpreted as an operat
 or algebraic version of the classical Gysin sequence for circle bundles. \
 nAssumed Knowledge: Elementary C*-algebra theory.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christopher Schafhauser (University of Nebraska\, Lincoln)
DTSTART:20200514T154500Z
DTEND:20200514T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/2/">A
 pproximating traces: what\, why and how</a>\nby Christopher Schafhauser (U
 niversity of Nebraska\, Lincoln) as part of UK Virtual operator algebras s
 eminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ana Khukhro (University of Cambridge)
DTSTART:20200604T150000Z
DTEND:20200604T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/3/">E
 xpanders and generalisations</a>\nby Ana Khukhro (University of Cambridge)
  as part of UK Virtual operator algebras seminar\n\n\nAbstract\nAfter reca
 lling some motivation for studying highly-connected graphs in the context 
 of operator algebras and large-scale geometry\, we will introduce the noti
 on of "asymptotic expansion" recently defined by Li\, Nowak\, Spakula and 
 Zhang. We will explore some applications of this definition\, hopefully cu
 lminating in joint work with Li\, Vigolo and Zhang.\n\nAssumed Knowledge: 
 basic operator-algebraic concepts\, some geometric intuition\n
LOCATION:https://researchseminars.org/talk/UKVOAS/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hannes Thiel (University of Münster)
DTSTART:20200604T154500Z
DTEND:20200604T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/5/">C
 untz semigroups</a>\nby Hannes Thiel (University of Münster) as part of U
 K Virtual operator algebras seminar\n\n\nAbstract\nThe Cuntz semigroup is 
 a geometric refinement of K-theory that plays an important role in the str
 ucture theory of C*-algebras. It is defined analogously to the Murray-von 
 Neumann semigroup by using equivalence classes of positive elements instea
 d of projections.  \nStarting with the definition of the Cuntz semigroup o
 f a C*-algebra\, we will look at some of its classical applications. I wil
 l then talk about the recent breakthroughs in the structure theory of Cunt
 z semigroups and some of the consequences.\n\nAssumed Knowledge: Basic C*-
 algebra theory\, including comparison theory for projections.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matthew Kennedy (University of Waterloo)
DTSTART:20200618T154500Z
DTEND:20200618T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/6/">T
 he algebraic structure of C*-algebras associated to groups</a>\nby Matthew
  Kennedy (University of Waterloo) as part of UK Virtual operator algebras 
 seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nigel Higson (ennsylvania State University)
DTSTART:20200702T150000Z
DTEND:20200702T160000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/7
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/7/">J
 ohn Roe and Coarse Geometry</a>\nby Nigel Higson (ennsylvania State Univer
 sity) as part of UK Virtual operator algebras seminar\n\n\nAbstract\nJohn 
 Roe was a much admired figure in topology and noncommutative geometry\, an
 d the creator of the C*-algebraic approach to coarse geometry.  John died 
 in 2018 at the age of 58. My aim in the first part of the lecture will be 
 to explain in very general terms the major themes in John’s work\, and i
 llustrate them by presenting one of his best-known results\, the partition
 ed manifold index theorem.  After the break I shall describe a later resul
 t\, about relative eta invariants\, that has inspired an area of research 
 that is still very active.\n\nAssumed Knowledge: First part: basic familia
 rity with C*-algebras\, plus a little topology. Second part: basic familia
 rity with K-theory for C*-algebras.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ivan Todorov (Queen's University Belfast)
DTSTART:20200618T150000Z
DTEND:20200618T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/8
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/8/">N
 on-local games: operator algebraic approaches</a>\nby Ivan Todorov (Queen'
 s University Belfast) as part of UK Virtual operator algebras seminar\n\n\
 nAbstract\nThe study of non-local games has involved fruitful interactions
  between operator algebra theory and quantum physics\, with a starting poi
 nt the link between the Connes Embedding Problem and the Tsirelson Problem
 \, uncovered by Junge et al (2011) and Ozawa (2013). Particular instances 
 of non-local games\, such as binary constraint system games and synchronou
 s games\, have played an important role in the pursuit of the resolution o
 f these problems. In this talk\, I will summarise part of the operator alg
 ebraic toolkit that has proved useful in the study of non-local games and 
 of their perfect strategies\, highlighting the role C*-algebras and operat
 or systems play in their mathematical understanding.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Karen Strung (Czech Academy of Sciences)
DTSTART:20200716T150000Z
DTEND:20200716T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/9
DESCRIPTION:by Karen Strung (Czech Academy of Sciences) as part of UK Virt
 ual operator algebras seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gábor Szabó (KU Leuven)
DTSTART:20200730T150000Z
DTEND:20200730T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/10
DESCRIPTION:by Gábor Szabó (KU Leuven) as part of UK Virtual operator al
 gebras seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sven Raum (Stockholm University)
DTSTART:20200716T154500Z
DTEND:20200716T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/11
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/11/">
 C*-superrigidity</a>\nby Sven Raum (Stockholm University) as part of UK Vi
 rtual operator algebras seminar\n\n\nAbstract\nA discrete group is called 
 C*-superrigid\, if it can be recovered from its reduced group C*-algebra. 
 This notation parallels W*-superrigidty for von Neumann algebras. Motivate
 d by Higman's unit conjecture for complex group rings\, one can ask whethe
 r every torsion-free group is C*-superrigid. Surprisingly until 2017 the o
 nly known examples of torsion-free C*-superrigid groups were abelian.\nIn 
 this talk\, I will introduce you to the concept and motivation of C*-super
 rigidity. Subsequently\, I will describe developments around this topic si
 nce 2017\, and exemplify relevant ideas through my joint work with Caleb E
 ckhardt\, which shows that all finitely generated\, torsion-free\, 2-step 
 nilpotent groups are C*-superrigid. I will end the talk by sharing my pers
 pective on the future of the topic.\n\nAssumed Knowledge: Basics of operat
 or algebras.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ulrich Pennig (Cardiff)
DTSTART:20200813T150000Z
DTEND:20200813T160000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/12
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/12/">
 An Introduction to Dixmier-Douady theory</a>\nby Ulrich Pennig (Cardiff) a
 s part of UK Virtual operator algebras seminar\n\n\nAbstract\nA bundle of 
 C*-algebras is a collection of algebras continuously parametrised by a top
 ological space. There are (at least) two different definitions in operator
  algebras that make this intuition precise: Continuous C(X)-algebras provi
 de a flexible analytic point of view\, while locally trivial C*-algebra bu
 ndles allow a classification via homotopy theory. The section algebra of a
  bundle in the topological sense is a C(X)-algebra\, but the converse is n
 ot true. In this talk I will compare these two notions using the classical
  work of Dixmier and Douady on bundles with fibres isomorphic to the compa
 cts  as a guideline. I will then explain joint work with Marius Dadarlat\,
  in which we showed that the theorems of Dixmier and Douady can be general
 ized to bundles with fibers isomorphic to stabilized strongly self-absorbi
 ng C*-algebras. An important feature of the theory is the appearance of hi
 gher analogues of the Dixmier-Douady class.\n\nAssumed Knowledge: basic fa
 miliarity with C*-algebras\, some background in topology\, in particular c
 ohomology\, might be useful\, but is not required\, similarly for strongly
  self-absorbing C*-algebras.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Veronique Fischer (University of Bath)
DTSTART:20200730T154500Z
DTEND:20200730T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/13
DESCRIPTION:by Veronique Fischer (University of Bath) as part of UK Virtua
 l operator algebras seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Amine Marrakch (Lyon)
DTSTART:20200813T154500Z
DTEND:20200813T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/14
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/14/">
 The Gaussian functor and its applications</a>\nby Amine Marrakch (Lyon) as
  part of UK Virtual operator algebras seminar\n\n\nAbstract\nThe Gaussian 
 functor associates to every real hilbert space a canonical probability spa
 ce called the Gaussian probability space. This construction is an importan
 t tool with a wide range of applications in various domains : ergodic theo
 ry\, probability theory\, operator algebras\, representation theory and mo
 re recently geometric group theory. In this talk\, I will recall this cons
 truction and present several applications.\n
LOCATION:https://researchseminars.org/talk/UKVOAS/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Makoto Yamashita (University of Oslo)
DTSTART:20200910T150000Z
DTEND:20200910T154500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/16
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/16/">
 Compact quantum Lie groups</a>\nby Makoto Yamashita (University of Oslo) a
 s part of UK Virtual operator algebras seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gábor Szabó (KU Leuven)
DTSTART:20200910T154500Z
DTEND:20200910T163000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/17
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/17/">
 A peek into the classification of C*-dynamics</a>\nby Gábor Szabó (KU Le
 uven) as part of UK Virtual operator algebras seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lauren Ruth (Mercy College\, NY)
DTSTART:20201022T143000Z
DTEND:20201022T151500Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/18
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/18/">
 Von Neumann algebras and equivalences between groups</a>\nby Lauren Ruth (
 Mercy College\, NY) as part of UK Virtual operator algebras seminar\n\nAbs
 tract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Robin Deeley (University of Colorado\, Boulder)
DTSTART:20201022T151500Z
DTEND:20201022T160000Z
DTSTAMP:20260422T225847Z
UID:UKVOAS/19
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKVOAS/19/">
 The C*-algebras associated to a Wieler solenoid</a>\nby Robin Deeley (Univ
 ersity of Colorado\, Boulder) as part of UK Virtual operator algebras semi
 nar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UKVOAS/19/
END:VEVENT
END:VCALENDAR