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TZOFFSETFROM:-0500
TZOFFSETTO:-0400
DTSTART:20260308T070000
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TZOFFSETFROM:-0400
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DTSTART:20251102T060000
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BEGIN:VEVENT
UID:6a53379bdddeb
DTSTART;TZID=America/Toronto:20260716T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260716T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-beining-mu-degree
SUMMARY:Computability Learning Seminar | Beining Mu | Degree of categoricit
 y\nand treeable degrees
CLASS:PUBLIC
DESCRIPTION:BEINING MU\, UNIVERSITY OF WATERLOO\n\n_Degree of categoricity 
 and treeable degrees_\n\nIn this seminar\, we will discuss treeable degree
 s and degree of\ncategoricity. We will introduce past results on which deg
 rees can or\ncannot be a degree of categoricity and when degrees of catego
 ricity\ncoincide with treeable degrees. We will also introduce a notion\no
 f \\(\\Pi^0_1\\) singletons as an example of treeable degrees and their\n
 relation to degree of categoricity.\n\nMC 5403
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379bdf072
DTSTART;TZID=America/Toronto:20260717T113000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260717T123000
URL:https://uwaterloo.ca/pure-mathematics/events/ergodic-theory-learning-se
 minar-julius-frizzell-factors
SUMMARY:Ergodic Theory Learning Seminar | Julius Frizzell | Factors of Meas
 ure\nPreserving Systems
CLASS:PUBLIC
DESCRIPTION:JULIUS FRIZZELL\, UNIVERSITY OF WATERLOO\n\n_Factors of Measure
  Preserving Systems_\n\nWe will discuss the basic idea of homomorphisms of
  measure spaces and\nmeasure preserving systems and what it means for a me
 asure preserving\nsystem to be a factor of another measure preserving syst
 em.\n\nMC 5417
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379bdfbae
DTSTART;TZID=America/Toronto:20260716T110000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260716T120000
URL:https://uwaterloo.ca/pure-mathematics/events/algebraic-geometry-working
 -seminar-jack-jia-categories
SUMMARY:Algebraic Geometry Working Seminar | Jack Jia | Categories of\nrepr
 esentations of groups are well-behaved
CLASS:PUBLIC
DESCRIPTION:JACK JIA\, UNIVERSITY OF WATERLOO\n\n_Categories of representat
 ions of groups are well-behaved_\n\nThey are abelian (behave like module c
 ategories)\, symmetric monoidal\n(have tensor products)\, every object has
  a dual and is semi-simple\, to\nname a few. A natural question to ask is 
 whether every category that\nexhibits similar behaviour is a representatio
 n category. Deligne\nproved a remarkable theorem that shows every symmetri
 c tensor category\nwith some imposed growth condition is in fact a categor
 y of\nrepresentations. Moreover\, he constructed some symmetric tensor\nca
 tegories with faster-than-exponential growth-these are so-called\nDeligne 
 categories\, which can be interpreted as complex rank analogs\nof classica
 l representation categories. In this talk\, I will introduce\nthe notion o
 f symmetric tensor categories\, state Deligne’s Theorem\,\nand construct
  some of the Deligne categories.\n\nMC 5403
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be06c7
DTSTART;TZID=America/Toronto:20260715T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260715T150000
URL:https://uwaterloo.ca/pure-mathematics/events/special-number-theory-semi
 nar-quang-khai-nguyen-generating
SUMMARY:Special Number Theory Seminar | Quang-Khai Nguyen | Generating Seri
 es\nin Algebraic Dynamics
CLASS:PUBLIC
DESCRIPTION:QUANG-KHAI NGUYEN\, UNIVERSITE DE LYON\n\n_Generating Series in
  Algebraic Dynamics_\n\nIn this talk\, we will discuss the generating seri
 es associated with a\nself-map of a projective variety. This series is imp
 ortant in\nunderstanding the dynamical degree and plays an important role 
 in the\nrecent construction of the transcendental dynamical degree by Bell
 \,\nDiller\, and Jonsson. This talk will focus on some analytic and\nalgeb
 raic properties of such a series. It turns out that in some\ncases\, ratio
 nality is rather the exception.\n\nMC 5403
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be1191
DTSTART;TZID=America/Toronto:20260710T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260710T163000
URL:https://uwaterloo.ca/pure-mathematics/events/geometry-and-topology-semi
 nar-anton-iliashenko-deformation
SUMMARY:Geometry and Topology Seminar | Anton Iliashenko | Deformation theo
 ry\nof associative and coassociative Smith maps
CLASS:PUBLIC
DESCRIPTION:ANTON ILIASHENKO\, BEIJING INSTITUTE OF MATHEMATICAL SCIENCES A
 ND\nAPPLICATIONS\n\n_Deformation theory of associative and coassociative S
 mith maps _\n\nAssociative and coassociative Smith maps are generalization
 s of\npseudo-holomorphic curves in the \\(G_2\\) setting. We construct th
 e\nright framework for the deformation theory using the spinorial\nformula
 tion. This is enough to establish generic non-existence. Then\nwe discuss 
 where the theory goes from there.\n\nMC 5403
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be1798
DTSTART;TZID=America/Toronto:20260706T150000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260706T163000
URL:https://uwaterloo.ca/pure-mathematics/events/model-theory-working-semin
 ar-45
SUMMARY:Model Theory Working Seminar
CLASS:PUBLIC
DESCRIPTION:JULES RIBOLZI\, UNIVERSITY OF WATERLOO\n\n_Definable groups in 
 the nonstandard model of CCM_\n\nWe review the two main results about defi
 nable groups in the\nnonstandard model of CCM.\n\nM3 4001
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be227f
DTSTART;TZID=America/Toronto:20260708T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260708T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-198
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:VIKTOR MAJEWSKI\, UNIVERSITY OF WATERLOO\n\n_Generalized Seiber
 g-Witten Equations and where to find them _\n\nEverywhere.\n\nMC 5417
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be2fe7
DTSTART;TZID=America/Toronto:20260708T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260708T153000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-197
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:FAISAL ROMSHOO\, UNIVERSITY OF WATERLOO\n\n_Anisotropic Calibra
 tions_\n\nI aim to talk about some of the technical details in Tomasso Pac
 ini\nand Kotaro Kawai’s paper ”Anisotropiccalibrations\, adiabatic\nli
 mits\, and mirror symmetry” which Tomasso presented in the Geometry\nand
  Topology seminar last month. If time permits\, I want to explore\nhow we 
 can generalize the notion of Smith maps using anisotropic\ncalibrations.\n
 \nMC 5417
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be3d3b
DTSTART;TZID=America/Toronto:20260709T133000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20260709T150000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-176
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:MICHAEL GREGORY\, UNIVERSITY OF WATERLOO\n\n_The Complexity of 
 the Isomorphism Problem for Finitely Generated\nAlgebras_\n\nWe review the
  arithmetic hierarchy and use it to analyze the\nisomorphism problem for f
 initely generated c.e. algebras. We introduce\nthe ascending chain conditi
 on (ACC) on congruences and explain how it\nrestricts the complexity of is
 omorphism. We show that any finitely\ngenerated c.e. algebra whose congrue
 nce lattice satisfies ACC has\na \\(\\Pi_2\\) isomorphism problem. Then\,
  we prove that the\nclass \\(UF_2\\) of algebras with two unary operation
 s has\n\\(\\Sigma_3\\)-complete isomorphism problem.\n\nMC 5403
DTSTAMP:20260712T064339Z
END:VEVENT
BEGIN:VEVENT
UID:6a53379be4995
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:20260712T064339Z
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