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DTSTART:20240310T070000
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DTSTART:20231105T060000
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UID:6701456653e2f
DTSTART;TZID=America/Toronto:20241011T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241011T163000
URL:https://uwaterloo.ca/pure-mathematics/events/geometry-and-topology-semi
nar-22
SUMMARY:Geometry and Topology Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nJESSE HUANG\, UNIVERSITY OF WATERLOO\n\nBirational
coherent constructible correspondence\n\nA major progress towards the Homo
logical Mirror Symmetry (HMS)\nconjecture of Kontsevich is a version of HM
S for toric varieties\nproved by Fang-Liu-Treumann-Zaslow and Kuwagaki usi
ng constructible\nsheaves\, following an approach originally introduced by
Bondal. These\nresults suggest that Bondal's approach can be reinvested a
s a powerful\ntool to investigate fundamental algebraic questions pertaini
ng to the\nbirational geometry of toric varieties\, and have inspired rece
nt works\nof Hanlon-Hicks-Lazarev and my works with Favero\, both used Bon
dal's\nmap to obtain short resolutions of the diagonal by a specific\ncoll
ection of line bundles. In this talk\, I will discuss these results\nand t
heir connections to noncommutative resolutions of toric\nsingularities and
the broader goal to establish birational toric HMS.\n\nMC 5417\n
DTSTAMP:20241005T135550Z
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BEGIN:VEVENT
UID:6701456654cd8
DTSTART;TZID=America/Toronto:20241009T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241009T163000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
ing-seminar-117
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nJACQUES VAN WYK\, UNIVERSITY OF WATERLOO\n\n“The
” Generalised Levi-Civita Connection\n\nI will discuss the notions of ge
neralised metrics and generalised\nconnections in generalised geometry. A
generalised connection has an\nassociated torsion tensor\, so one may ask\
, if given a generalised\nmetric G\, whether there is a torsion-free conne
ction D compatible with\nG\; this is the analogue of the Levi-Civita conne
ction. We will see\nthat there are infinitely many such connections D\, th
at is\, there is\nno unique “generalised Levi-Civita connection\,” a s
triking\ndifference from the situation for Riemannian geometry.\n\nMC 5479
\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:6701456655a4a
DTSTART;TZID=America/Toronto:20241008T102000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241008T111000
URL:https://uwaterloo.ca/pure-mathematics/events/number-theory-seminar-128
SUMMARY:Number Theory Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nDAVID MCKINNON\, UNIVERSITY OF WATERLOO\n\nHow crow
ded can rational solutions be?\n\nSay you've got the equation x^2-2y^2=z^4
-1. Lots of rational solutions\nthere\, like (1\,1\,0). How are those solu
tions distributed in 3-space?\nIn particular\, how close can they get to (
1\,1\,0)? This abstract has\nthe questions\, but the talk has the answers.
Well\, some of 'em.\n\nMC 5479\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:67014566562a4
DTSTART;TZID=America/Toronto:20240810T163000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20240810T180000
URL:https://uwaterloo.ca/pure-mathematics/events/grad-colloquium-4
SUMMARY:Grad Colloquium
CLASS:PUBLIC
DESCRIPTION:Summary \n\nADINA GOLDBERG\, UNIVERSITY OF WATERLOO \n\nCategor
ical Strings for Quantum Things\n\nHeard of quantum graphs or quantum grou
ps? Wondering if this is the\nsame as the \"physics\" notion of quantum\,
as in quantum entanglement or\nquantum channels? When I started my PhD\, I
was perplexed. Now\, some\nyears of marinating in the stew of categorical
quantum mechanics has\nconvinced me of its descriptive power for tackling
all things quantum.\nI will show you the string-diagram interface that go
es hand-in-hand\nwith dagger (compact/symmetric monoidal) categories\, and
give\nexamples. Prerequisites: Familiarity with the vague idea of a\ncate
gory\, and a willingness to wave your hands a little bit.\n\nMC 5501\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:6701456656a77
DTSTART;TZID=America/Toronto:20241016T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241016T163000
URL:https://uwaterloo.ca/pure-mathematics/events/geometry-and-topology-semi
nar-21
SUMMARY:Geometry and Topology Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nVIKTOR MAJEWSKI\, HUMBOLDT UNIVERSITY BERLIN\n\nRes
olutions of Spin(7)-Orbifolds\n\nIn Joyce’s seminal work\, he constructe
d the first examples of\ncompact manifolds with exceptional holonomy by re
solving flat\norbifolds. Recently\, Joyce and Karigiannis generalised thes
e ideas in\nthe G2 setting to orbifolds with Z2-singular strata. In this t
alk I\nwill present a generalisation of these ideas to Spin(7) orbifolds a
nd\nmore general isotropy types. I will highlight the main aspects of the\
nconstruction and the analytical difficulties.\n\nMC 5479\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:67014566570ca
DTSTART;TZID=America/Toronto:20241010T160000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241010T173000
URL:https://uwaterloo.ca/pure-mathematics/events/analysis-seminar-184
SUMMARY:Analysis Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nADINA GOLDBERG\, UNIVERSITY OF WATERLOO\n\nSynchron
ous Quantum Games\n\nWe recast nonlocal games using string diagrams\, allo
wing for a natural\nextension to quantum games (with bipartite question an
d answer\nstates). We define strategies in this setting and show that\nsyn
chronous quantum games require synchronized players to win. We give\nexamp
les of some quantum games on quantum graphs and see that these\nrequire qu
antum homo/isomorphisms to win. (The talk is based on a\npreprint ``Quantu
m games and synchronicity''\n(https://arxiv.org/abs/2408.15444). This work
is inspired by Musto\,\nReutter\, and Verdon's paper ``A compositional ap
proach to quantum\nfunctions''\, and relies heavily on the reference ``Cat
egories for\nQuantum Theory'' by Heunen and Vicary for string diagrams in
quantum\ninformation.)\n\nMC 5417 \n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:6701456657a49
DTSTART;TZID=America/Toronto:20241008T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241008T150000
URL:https://uwaterloo.ca/pure-mathematics/events/logic-seminar-68
SUMMARY:Logic Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nMATTHEW HARRISON-TRAINOR\, UNIVERSITY OF ILLINOIS C
HICAGO\n\nScott analysis of linear orders\n\nThe Scott analysis measures t
he complexity of describing a structure\nup to isomorphism\, and equivalen
tly the complexity of describing its\nautomorphism orbits\, and of computi
ng isomorphisms between different\ncopies. I will introduce the Scott anal
ysis in general and talk about\nthe Scott analysis of linear orders in par
ticular. Linear orders have\na few special properties which makes their be
haviour quite interesting\nand sometimes different from structures in gene
ral.\n\nMC 5479\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:670145665811e
DTSTART;TZID=America/Toronto:20241008T110000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241008T120000
URL:https://uwaterloo.ca/pure-mathematics/events/algebraic-geometry-working
-seminar-77
SUMMARY:Algebraic Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nCYNTHIA DAI\, UNIVERSITY OF WATERLOO\n\nHeight Modu
lis on Toric Stacks\n\nIn this talk we will go through Matt’s work on he
ight modulis on\nweighted projective space\, mainly its construction\, and
then its\napplication. If time permits\, I will talk about generalization
s of\nthis construction to toric stacks.\n\nMC 5403\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:6701456658809
DTSTART;TZID=America/Toronto:20241008T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241008T163000
URL:https://uwaterloo.ca/pure-mathematics/events/mcmaster-waterloo-model-th
eory-seminar-0
SUMMARY:McMaster-Waterloo Model Theory Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nJOEY LAKERDAS-GAYLE\, UNIVERSITY OF WATERLOO\n\nSym
metrically indivisible and elementarily indivisible structures\n\nA first
order structure M is indivisible if for every colouring of M\ninto two col
ours\, there is a monochromatic substructure N of M that is\nisomorphic to
M. We will consider two stronger properties: M is\nsymmetrically indivisi
ble if N can be chosen so that every\nautomorphism of N extends to an auto
morphism of M\; and M is\nelementarily indivisible if N can be chosen to b
e an elementary\nsubstructure of M. We will discuss Model-Theoretic method
s developed\nby Kojman and Geschke (2008)\, Hasson\, Kojman\, and Onshuus
(2009)\, and\nMeir (2019) to study the relationships between these notions
.\n\nMC 5403\n
DTSTAMP:20241005T135550Z
END:VEVENT
BEGIN:VEVENT
UID:6701456658eb2
DTSTART;TZID=America/Toronto:20241002T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20241002T153000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
inar-140
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:Summary \n\nJOEY LAKERDAS-GAYLE\, UNIVERSITY OF WATERLOO\n\nFun
damentals of Computability Theory 3\n\nWe will continue learning about pri
ority constructions\, now using the\nfinite injury method\, following Robe
rt Soare's textbook.\n\nMC 5403\n
DTSTAMP:20241005T135550Z
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