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DTSTART:20260308T070000
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DTSTART:20251102T060000
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BEGIN:VEVENT
UID:6aaa93b10b174
DTSTART;TZID=America/Toronto:20260922T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260922T160000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-viktor-majewski-non
SUMMARY:Differential Geometry Working Seminar | Viktor Majewski |\nNon-Exis
 tence of Smooth Full-Holonomy Cayley Fibrations
CLASS:PUBLIC
DESCRIPTION:VIKTOR MAJEWSKI (UNIVERSITY OF WATERLOO) \n_Non-Existence of Sm
 ooth Full-Holonomy Cayley Fibrations_ \nIn this talk\, I complete the proo
 f that every Cayley fibration of a\ncompact torsion-free Spin(7)-manifold 
 with full holonomy must have\nsingular fibers. This confirms a long-standi
 ng expectation in the\nstudy of calibrated fibrations with exceptional hol
 onomy. Last\nsemester\, I showed that using the rigidity of the Spin(7)-st
 ructure to\nreduce any hypothetical nonsingular Cayley fibration to two po
 ssible\ntopological configurations. This time\, I exclude both by proving 
 a new\nspinnability theorem for smooth fiber bundles over simply-connected
 \n4-manifolds with fiber homeomorphic to the elliptic surfaces E(2) or\nE(
 4). The E(4) case\, which constitutes the main new difficulty\, is\nestabl
 ished by combining families Seiberg–Witten theory with\nparametrized equ
 ivariant homotopy theory and equivariant K-theory. \nMC 5417
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b10cea9
DTSTART;TZID=America/Toronto:20260924T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260924T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-joey-lakerdas-gayle-pairs
SUMMARY:Computability Learning Seminar | Joey Lakerdas-Gayle | The Pairs of
 \nStructures Theorem
CLASS:PUBLIC
DESCRIPTION:JOEY LAKERDAS-GAYLE (UNIVERSITY OF WATERLOO) \n_The Pairs of St
 ructures Theorem_ \nWe will finish the proof of the Pairs of Structures th
 eorem using the\nGame Metatheorem. \nMC 5301
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b10f996
DTSTART;TZID=America/Toronto:20260921T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260921T153000
URL:https://uwaterloo.ca/pure-mathematics/events/pure-mathematics-colloquiu
 m-hunter-sprink-forest-polynomials
SUMMARY:Pure Mathematics Colloquium | Hunter Sprink | Forest polynomials an
 d\nquasisymmetry
CLASS:PUBLIC
DESCRIPTION:HUNTER SPRINK (UNIVERSITY OF TORONTO)\n\n_Forest polynomials an
 d quasisymmetry_\n\nIn this talk I will introduce the combinatorics behind
  some new\nconnections between the classical notion of quasisymmetry in al
 gebraic\ncombinatorics to the geometry of the flag variety.\n\nMC 5501
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b113142
DTSTART;TZID=America/Toronto:20260918T110000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260918T120000
URL:https://uwaterloo.ca/pure-mathematics/events/algebraic-geometry-working
 -seminar-catherine-st-pierre
SUMMARY:Algebraic Geometry Working Seminar | Catherine St-Pierre |\nOrganiz
 ational Meeting
CLASS:PUBLIC
DESCRIPTION:CATHERINE ST-PIERRE (UNIVERSITY OF WATERLOO)\n\n_Organizational
  Meeting_\n\nWe will discuss the seminar format and plan the talks for the
  session.\n\nMC 5403
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b1175ec
DTSTART;TZID=America/Toronto:20260917T150000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260917T160000
URL:https://uwaterloo.ca/pure-mathematics/events/model-theory-seminar-yuton
 g-duan-strongly-minimal-sets-dcf0
SUMMARY:Model Theory Seminar | Yutong Duan | Strongly Minimal Sets in DCF_0
CLASS:PUBLIC
DESCRIPTION:YUTONG DUAN (UNIVERSITY OF WATERLOO)\n\n_Strongly Minimal Sets 
 in DCF_0_\n\nWe introduce the theory of differentially closed fields of\nc
 haracteristic zero (DCF_0) and the pregeometry associated with\nminimal ty
 pes\, and explain how strong minimality connects questions\nabout ordinary
  differential equations with model theory.\n\nMC 5403
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b11abbe
DTSTART;TZID=America/Toronto:20260916T103000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260916T113000
URL:https://uwaterloo.ca/pure-mathematics/events/birational-geometry-learni
 ng-seminar-kaleb-d-ruscitti-blow
SUMMARY:Birational Geometry Learning Seminar | Kaleb D Ruscitti | Blow ups 
 and\nCastelnuovo's Theorem
CLASS:PUBLIC
DESCRIPTION:KALEB D RUSCITTI (UNIVERSITY OF WATERLOO) \n\n_Blow ups and Cas
 telnuovo's Theorem_ \n\nThis week we are discussing: \nVakil section 28.6\
 , \nHartshorne V.3\, \nKollar-Mori \"Introduction\"\, \nfocusing on blow u
 ps of surfaces and Castelnuovo's theorem. \nMC 5301
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b11bf28
DTSTART;TZID=America/Toronto:20260916T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260916T153000
URL:https://uwaterloo.ca/pure-mathematics/events/pure-mathematics-colloquiu
 m-yasuyuki-kawahigashi-operator
SUMMARY:Pure Mathematics Colloquium | Yasuyuki Kawahigashi | Operator\nalge
 bras\, conformal field theory and condensed matter physics
CLASS:PUBLIC
DESCRIPTION:YASUYUKI KAWAHIGASHI (UNIVERSITY OF TOKYO)\n\n_Operator algebra
 s\, conformal field theory and condensed matter\nphysics_\n\nWe present an
  operator algebraic approach to conformal field theory\nin connection to 
 other topics such as vertex operator algebras\,\nquantum groups and quantu
 m invariants in low-dimensional topology\,\nwhich started with subfactor t
 heory of Jones. We then present recent\nadvances on similar mathematical s
 tructures that appear in\ntwo-dimensional condenses matter physics such as
  quantum spin systems\,\ntensor networks and topological quantum computati
 on. No knowledge on\noperator algebras are assumed. \nMC 5479
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b11da67
DTSTART;TZID=America/Toronto:20260915T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260915T160000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-spiro-karigiannis-0
SUMMARY:Differential Geometry Working Seminar | Spiro Karigiannis |\nOrgani
 zational Meeting
CLASS:PUBLIC
DESCRIPTION:SPIRO KARIGIANNIS (UNIVERSITY OF WATERLOO)\n\n_Organizational M
 eeting_\n\nWe will plan the speakers for the rest of the semester.\n\nMC 5
 417
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b11fb03
DTSTART;TZID=America/Toronto:20260917T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260917T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-joey-lakerdas-gayle-game
SUMMARY:Computability Learning Seminar | Joey Lakerdas-Gayle | The Game\nMe
 tatheorem
CLASS:PUBLIC
DESCRIPTION:JOEY LAKERDAS-GAYLE (UNIVERSITY OF WATERLOO) \n\n_The Game Meta
 theorem_ \nThe Game Metatheorem is a framework for constructing computable
 \nstructures as a game between players using noncomputable\n\\(\\Delta^0_\
 \eta\\) information for a transfinite ordinal \\(\\eta\\). We\nwill introd
 uce the Game Metatheorem following Montalbán's second\ncomputable structu
 re theory book\, and use it to prove the pairs of\nstructures theorem. \nM
 C 5301
DTSTAMP:20260916T130345Z
END:VEVENT
BEGIN:VEVENT
UID:6aaa93b1217aa
DTSTART;TZID=America/Toronto:20260909T103000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260909T113000
URL:https://uwaterloo.ca/pure-mathematics/events/birational-geometry-learni
 ng-seminar-kaleb-d-ruscitti
SUMMARY:Birational Geometry Learning Seminar | Kaleb D Ruscitti | Planning 
 &\nIntroduction
CLASS:PUBLIC
DESCRIPTION:KALEB D RUSCITTI (UNIVERSITY OF WATERLOO) \n\n_Planning & Intro
 duction_ \n\nIn this seminar we will learn about birational geometry\, sin
 gularity\ntheory and the minimal model program\, following the textbook of
  Kollar\nand Mori. \nThis week's seminar will be to assess interest\, intr
 oduce the subject\nmaterial and plan the rest of the term's seminars. \nMC
  5301
DTSTAMP:20260916T130345Z
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