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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:6a4430f9a3302
DTSTART;TZID=America/Toronto:20260702T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260702T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-175
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:MICHAEL GREGORY\, UNIVERSITY OF WATERLOO\n\n_Basic Universal Al
 gebra Aimed at Isomorphism Problems for c.e.\nPresentations_\n\nWe begin w
 ith the notions of a universal algebra\, homomorphism\,\ncongruence\, and 
 quotient algebra\, and discuss the relationship between\ncongruences and h
 omomorphic images. We then introduce term algebras\nand varieties\, culmin
 ating in a statement of Birkhoff's HSP Theorem.\nTo prepare for later comp
 utability applications\, we briefly review\nlattices and the congruence la
 ttice of an algebra. Finally\, we\ndescribe how finitely generated and com
 putably enumerable algebras may\nbe specified by presentations.\n\nMC 5403
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a444a
DTSTART;TZID=America/Toronto:20260703T113000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260703T123000
URL:https://uwaterloo.ca/pure-mathematics/events/ergodic-theory-learning-se
 minar-5
SUMMARY:Ergodic Theory Learning Seminar
CLASS:PUBLIC
DESCRIPTION:JULIUS FRIZZELL\, UNIVERSITY OF WATERLOO\n\n_Roth's Theorem_\n\
 nWe will continue to discuss unitary transformations and generic\nmeasures
  and work towards a proof of Roth's theorem for arithmetic\nprogressions.\
 n\nMC 5417
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a4d58
DTSTART;TZID=America/Toronto:20260625T110000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260625T120000
URL:https://uwaterloo.ca/pure-mathematics/events/algebraic-geometry-seminar
 -16
SUMMARY:Algebraic geometry seminar
CLASS:PUBLIC
DESCRIPTION:CATHERINE ST-PIERRE\, UNIVERSITY OF WATERLOO\n\n_Group Actions 
 in Non-Commutative Algebraic Geometry: a survey of\nhomological property a
 nd invariants_\n\nWe survey non-commutative analogues of classical regular
 ity\,\nGorenstein\, and Cohen-Macaulay properties in the framework of\nArt
 in-Schelter. After reviewing the foundational homological\nproperties that
  govern this theory\, we will focus on the structure of\ninvariant rings u
 nder group and Hopf algebra actions and review some\nnoncommutative analog
 ues of classical results in invariant theory to\ncharacterize the invarian
 t rings of noncommutative rings. The talk\nconcludes with new results exte
 nding this invariant-theoretic\nframework.\n\nMC 5403
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a5634
DTSTART;TZID=America/Toronto:20260624T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260624T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-196
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:FACUNDO CAMANO\, UNIVERSITY OF WATERLOO\n\n_Equivalent Formulat
 ions of Monopole Asymptotics_\n\nI will go over three ways of defining mon
 opole asymptotics and prove\nthey are all equivalent for finite energy sol
 utions.\n\nMC 4058
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a5e0a
DTSTART;TZID=America/Toronto:20260624T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260624T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-195
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:KALEB RUSCITTI\, UNIVERSITY OF WATERLOO\n\n_Extending Hitchin's
  connection across nodal curves_\n\nHitchin gave a projectively flat conne
 ction on the 'Verlinde bundle'\nover the moduli space of complex structure
 s on a compact\ngenus \\(g>=2\\) surface (Flat connections and geometric 
 quantization\,\n1990). Such a surface can be deformed to a stable curve wi
 th nodal\nsingularities\, and I will discuss the extension of the Verlinde
  bundle\nand Hitchin's connection across such deformations.\n\nMC 4058
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a6624
DTSTART;TZID=America/Toronto:20260619T113000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260619T123000
URL:https://uwaterloo.ca/pure-mathematics/events/ergodic-theory-learning-se
 minar-4
SUMMARY:Ergodic Theory Learning Seminar
CLASS:PUBLIC
DESCRIPTION:JULIUS FRIZZELL\, UNIVERSITY OF WATERLOO\n\n_Generic Measures a
 nd Unitary Transformations_\n\nWe continue our discussion of generic measu
 res and prove some facts\nabout unitary transformations\, which moves us t
 oward a proof of Roth's\ntheorem.\n\nMC 5417
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a6e6a
DTSTART;TZID=America/Toronto:20260625T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260625T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-174
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:BEINING MU\, UNIVERSITY OF WATERLOO\n\n_Thickness Lemma and Inf
 inite Injury Priority Argument_\n\nIn this talk\, I will present Strong Th
 ickness Lemma\, which states that\nevery piecewise computable c.e. set has
  a thick subset which lies\noutside of an upper cone of a non-computable c
 .e. set\, as an example\nof infinite injury priority argument. In addition
 \, I will discuss how\nthickness lemma implies the lack of least upper bou
 nd for infinite\nascending c.e. degrees.\n\nMC 5403
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a74c2
DTSTART;TZID=America/Toronto:20260617T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260617T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-194
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:JACQUES VAN WYK\, UNIVERSITY OF WATERLOO\n\n_Generalised Comple
 x Structures on Products of Lie Groups_\n\nLet \\(M\\) be an even-dimens
 ional manifold\, and let \\(H\\) be a\nclosed three-form on \\(M\\). An
  \\(H\\)-twisted generalised complex\nstructure on \\(M\\) is an endomo
 rphism of \\(TM \\oplus T^*M\\)which\nsquares to −1\, preserves the nat
 ural pseudometric of \\(TM \\oplus\nT^*M\\)\, and whose \\(i\\)-eigenbund
 le is closed under the \\(H\\)-twisted\nDorfman bracket. A natural questio
 n is given a fixed closed\nthree-form \\(H\\) on \\(M\\)\, does there exi
 st an \\(H\\)-twisted\ngeneralised complex structure on \\(M\\)? We explor
 e this question for\nproducts of compact simple Lie groups. This is motiva
 ted by Marco\nGualtieri’s result that any even-dimensional Lie group wit
 h a\nbiinvariant metric admits a generalised complex structure.\n\nMC 4058
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a7b22
DTSTART;TZID=America/Toronto:20260618T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260618T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-173
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:JOEY LAKERDAS-GAYLE\, UNIVERSITY OF WATERLOO\n\n_Sacks' Splitti
 ng Theorem on a tree_\n\nWe will prove Sacks' Splitting Theorem following 
 the method of Steffen\nLempp which uses a dynamically constructed priority
  tree.\n\nMC 5403
DTSTAMP:20260630T211121Z
END:VEVENT
BEGIN:VEVENT
UID:6a4430f9a80c9
DTSTART;TZID=America/Toronto:20260617T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260617T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-193
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:ALEX PAWELKO\, UNIVERSITY OF WATERLOO\n\n_Adiabatic Limits of C
 oassociative Fibrations_\n\nI will be going through Donaldson’s paper 
 ”Adiabatic limits of\nco-associative KovalevLefschetz fibrations”.\n\n
 MC 4058
DTSTAMP:20260630T211121Z
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