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TZOFFSETFROM:-0500
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DTSTART:20260308T070000
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TZOFFSETFROM:-0400
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DTSTART:20251102T060000
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BEGIN:VEVENT
UID:6a9195b921be3
DTSTART;TZID=America/Toronto:20260819T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260819T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-danial-ghamari-higher
SUMMARY:Differential Geometry Working Seminar | Danial Ghamari | Higher Gau
 ge\nTheory
CLASS:PUBLIC
DESCRIPTION:DANIAL GHAMARI (UNIVERSITY OF WATERLOO) \n\n_Higher Gauge Theor
 y_ \n\nOrdinary gauge theory describes the parallel transport of point\npa
 rticles along paths using connections on principal bundles. Higher\ngauge 
 theory extends this framework to objects such as strings\, whose\nmotion s
 weeps out surfaces. This extension requires a corresponding\ncategorificat
 ion. \nAs long as time permits\, we will go through Baez and Schreiber (20
 06)\,\nHigher Gauge Theory\, and develop the main ideas presented there. I
 n\nparticular\, we will explain how Lie groups\, bundles\, and connections
 \nare replaced by Lie 2-groups\, principal 2-bundles\, and 2-connections.\
 nWe will motivate this structure through surface holonomy and the\nobstruc
 tion to describing nonabelian surface transport using ordinary\ngroups. We
  will then outline the construction of path and surface\nholonomy as a 2-f
 unctor\, the local description of a 2-connection by\ndifferential forms (A
 ) and (B)\, and its relation to nonabelian gerbes.\nTime permitting\, we w
 ill discuss why parametrization-independent\nsurface transport requires th
 e vanishing of the fake curvature.   \nIn the likely case that we do not
  manage to cover the entire paper\, we\nwill have follow-up talks in which
  we continue developing the theory. \nMC 5417     
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b922ecf
DTSTART;TZID=America/Toronto:20260821T160000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260821T173000
URL:https://uwaterloo.ca/pure-mathematics/events/masters-thesis-presentatio
 n-lilian-gardner-exotic-ii1-factor
SUMMARY:Master's Thesis Presentation | Lilian Gardner | The exotic II_1 fac
 tor
CLASS:PUBLIC
DESCRIPTION:LILIAN GARDNER (UNIVERSITY OF WATERLOO)\n\n_The exotic II_1 fac
 tor_\n\nIn https://arxiv.org/abs/2209.10645\, Chifan Ioana and Kunnawalkam
 \nElayavalli construct a separable II_1 factor without property Gamma\nand
  which is not elementarily equivalent to any II_1 factor with\npositive 1-
 bounded entropy (e.g. free group factors). We present the\nconstruction of
  this II_1 factor.\n\nMC 5403
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b923808
DTSTART;TZID=America/Toronto:20260817T160000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260817T173000
URL:https://uwaterloo.ca/pure-mathematics/events/masters-thesis-presentatio
 n-prelude-lilian-gardner-chifan
SUMMARY:Master's Thesis Presentation (Prelude) | Lilian Gardner | The\nChif
 an-Ioana-Kunnawalkam Elayavalli Lifting Lemma
CLASS:PUBLIC
DESCRIPTION:LILIAN GARDNER (UNIVERSITY OF WATERLOO)\n\n_The Chifan-Ioana-Ku
 nnawalkam Elayavalli Lifting Lemma_\n\nThe construction of a separable II_
 1 factor without property Gamma\,\nand which is not elementarily equivalen
 t to the free group factors\nrequires a lifting lemma\, for which if four 
 orthogonal projections in\nan ultraproduct of II_1 factors are chosen to s
 atisfy certain\nproperties\, then sequence representatives of each project
 ion can be\nchosen to also satisfy the same properties. We go over the pro
 of of\nthis lifting lemma.\n\nMC 5501
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b924042
DTSTART;TZID=America/Toronto:20260819T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260819T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-facundo-camano-0
SUMMARY:Differential Geometry Working Seminar | Facundo Camano | Tesserons 
 and\nWhere to Find Them
CLASS:PUBLIC
DESCRIPTION:FACUNDO CAMANO (UNIVERSITY OF WATERLOO) \n_Tesserons and Where 
 to Find Them_ \n\nMonopole moduli spaces... hopefully. \nMC 5417
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b92482a
DTSTART;TZID=America/Toronto:20260819T160000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260819T172000
URL:https://uwaterloo.ca/pure-mathematics/events/analysis-seminar-ian-charl
 esworth-mixtures-classical-and
SUMMARY:Analysis Seminar | Ian Charlesworth | Mixtures of classical and fre
 e\nindependence
CLASS:PUBLIC
DESCRIPTION:IAN CHARLESWORTH (CARDIFF UNIVERSITY)\n\n_Mixtures of classical
  and free independence_\n\n\\(\\varepsilon\\)-free probability was first i
 ntroduced by Mlotkowski in\nthe early 2000s to understand and model \\(q\
 \)-deformed Gaussian\nvariables\, which interpolate between the usual Gaus
 sian distribution\nat q = 1 and the free semicircular distribution at q = 
 0. It describes\nan independence relation for tuples of algebras\, some in
  free position\nand some in tensor position. A similar construction for gr
 oups (the\ngraph product\, which interpolates between the free product and
  the\ndirect product) was introduced by Green in 1990\, and extended to\no
 perator algebras by Caspers and Fima\, independently recovering\nMlotkowsk
 i's definitions. These objects have attracted quite a bit of\nattention ov
 er recent years\, both from the viewpoint of\nnon-commutative probability 
 theory and in studying their operator\nalgebraic properties directly. I wi
 ll discuss the state of the art\nconcerning \\(\\varepsilon\\)-free indep
 endence and graph product von\nNeumann algebras\, including work of others
  and some of my own.\nParticular focus will be given to my recent joint wo
 rk with Jekel\,\nwhere we are able to use a 1969 result of Cartier and Foa
 ta on the\ncombinatorics of words as the key to describing the type I summ
 ands of\na graph product of von Neumann algebras.\n\nMC 5403
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b925174
DTSTART;TZID=America/Toronto:20260820T103000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260820T120000
URL:https://uwaterloo.ca/pure-mathematics/events/algebraic-geometry-working
 -seminar-kaleb-ruscitti-sagbi
SUMMARY:Algebraic Geometry Working Seminar | Kaleb Ruscitti | SAGBI basis f
 or\nquiver semi-invariants using linked tableaux
CLASS:PUBLIC
DESCRIPTION:KALEB RUSCITTI (UNIVERSITY OF WATERLOO)\n\n_SAGBI basis for qui
 ver semi-invariants using linked tableaux_\n\nThere is a well-known constr
 uction of a SAGBI basis for the\nco-ordinate ring of a Grassmannian that i
 s described using\nsemi-standard young tableaux. Kalashnikov and Heuberger
  generalized\nparts of this theory to arbitrary moduli spaces of quiver\nr
 epresentations by introducing linked tableaux sets\, and then used\nthese 
 to describe a SAGBI basis for the semi-invariants of the\nKronecker quiver
 . In this talk I will discuss the further extension of\nthis theory to pro
 vide a SAGBI basis for any acyclic quiver\, indexed\nby the semi-standard 
 linked tableaux sets of an associated bipartite\nquiver.\n\nFrom 10:30-11:
 00 there will be a pre-seminar where we go over Young\nTableaux and their 
 relationship to semi-invariants of the\nGrassmannian.\n\nMC 5403
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b9259a5
DTSTART;TZID=America/Toronto:20260812T163000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260812T180000
URL:https://uwaterloo.ca/pure-mathematics/events/analysis-seminar-erik-segu
 in-minimality-noncommutative
SUMMARY:Analysis Seminar | Erik Seguin | Minimality in noncommutative dynam
 ics
CLASS:PUBLIC
DESCRIPTION:ERIK SEGUIN (UNIVERSITY OF WATERLOO)\n\n_Minimality in noncommu
 tative dynamics_\n\nIn this talk\, we discuss the notion of minimality for
  C*-dynamical\nsystems. We show that the accepted definition is somewhat\
 nunsatisfactory as an extension of its commutative counterpart from\nboth 
 a topological dynamical and an operator algebraic perspective and\npresent
  an alternative notion of an extension which rectifies these\nissues. We d
 iscuss various consequences of this alternative\ndefinition. \n\nMC 5403
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b926380
DTSTART;TZID=America/Toronto:20260812T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260812T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-alex-pawelko-adiabatic
SUMMARY:Differential Geometry Working Seminar | Alex Pawelko | Adiabatic\nL
 imits of Coassociative Fibrations II
CLASS:PUBLIC
DESCRIPTION:ALEX PAWELKO (UNIVERSITY OF WATERLOO)\n\n_Adiabatic Limits of C
 oassociative Fibrations II_\n\nWe'll continue working through Donaldson's 
 paper on coassociative\nKovalev-Lefschetz fibrations\, focusing on their a
 diabatic limits and\nglobal geometry.\n\nMC 5417
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b926d60
DTSTART;TZID=America/Toronto:20260805T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260805T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-alex-pawelko-wild
SUMMARY:Differential Geometry Working Seminar | Alex Pawelko | Wild\nSpecul
 ation about Homotopy Invariants of G_2 Structures
CLASS:PUBLIC
DESCRIPTION:ALEX PAWELKO (UNIVERSITY OF WATERLOO)\n\n_Wild Speculation abou
 t Homotopy Invariants of  G_2 Structures_ \nIn pursuit of a setting wher
 e one could phrase a G_2 Calabi\nconjecture\, we will try to understand a 
 certain homotopy-theoretic\nspace with which one can make sense of S7-valu
 ed cohomology. \nMC 5417
DTSTAMP:20260828T140545Z
END:VEVENT
BEGIN:VEVENT
UID:6a9195b927623
DTSTART;TZID=America/Toronto:20260805T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260805T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-spiro-karigiannis
SUMMARY:Differential Geometry Working Seminar | Spiro Karigiannis |\nDecomp
 osition of Riemann curvature in 4 dimensions (and beyond?)
CLASS:PUBLIC
DESCRIPTION:SPIRO KARIGIANNIS (UNIVERSITY OF WATERLOO)\n\n_Decomposition of
  Riemann curvature in 4 dimensions (and beyond?)_\n\nThis is a continuatio
 n of my earlier talk from May. We showed that the\nRiemann curvature tenso
 r of a Riemannian metric decomposes into three\northogonal components: the
  scalar curvature\, the traceless Ricci\ncurvature tensor\, and the Weyl c
 urvature tensor. We will see that in\ndimension 4 we can say more. The Wey
 l curvature decomposes into two\npieces\, and we will explicitly determine
  the decomposition the\ncurvature operator (as a self-adjoint operator on 
 2-forms). As an\napplication\, we will discuss the Singer-Thorpe Theorem c
 haracterizing\n4-dimensional Einstein metrics in terms of this decompositi
 on. If time\npermits\, we will briefly discuss a generalization of these i
 deas to\nG2-geometry in seven dimensions.\n\nMC 5417
DTSTAMP:20260828T140545Z
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