Sunday  Monday  Tuesday  Wednesday  Thursday  Friday  Saturday 

30  31  1  2  3  4  5 
 
6  7  8  9  10  11  12 

 
13  14  15  16  17  18  19 

 
20  21  22  23  24  25  26 


 
27  28  29  30  1  2  3 





9/3Probabillity And Data Science Colloquium
Probabillity And Data Science Colloquium
Thursday, September 3rd, 2020
02:00 PM  03:00 PM
Storrs Campus
OnlineWeekly colloquium with invited external speakers
Contact Information: Zhongyang Li More

9/9Algebra Seminar
Short Presentations By Algebra Faculty MembersAlgebra Seminar
Wednesday, September 9th, 2020
Short Presentations By Algebra Faculty Members
11:00 AM  12:05 PM
Storrs Campus
OnlineFaculty members of the algebra group will give short (10 minutes) presentations on their general areas of research. Graduate students that have not yet selected an adviser and particularly encouraged to attend. All are welcome.
The current lineup is Keith Conrad, KyuHwan Lee, Tom Roby, and a recorded lecture by Mihai Fulger.
Email the contact below to request the WebEx link and password.
Contact Information: mihai.fulger@uconn.edu More

9/9Math Club
Continued Fractions
Keith Conrad (UConn)Math Club
Wednesday, September 9th, 2020
Continued Fractions
Keith Conrad (UConn)
05:45 PM  06:35 PM
Storrs Campus
OnlineThe standard way to write down real numbers explicitly is with decimal expansions. Continued fractions are a different way of describing real numbers. They are far better than decimals at revealing the "best" rational approximations to a number. Areas of math where continued fractions appear include coding theory, combinatorics, dynamical systems, knot theory, hyperbolic geometry, and number theory.
In this talk we will see what continued fractions are as well as some of their properties and applications.
Note: Join the meeting at https://uconnvtc.webex.com/meet/mathclub
Contact Information: Keith Conrad More

9/11Logic Colloquium (Online): Sara Uckelman (Durham)
Logic Colloquium (Online): Sara Uckelman (Durham)
Friday, September 11th, 2020
11:00 AM  12:30 PM
Storrs Campus
onlineJoin us for the online Logic Colloquium for a talk by Sara Uckelman (Durham):
"What Problem Did LaddFranklin (Think She) Solve(d)?"
Christine LaddFranklin is often hailed as a guiding star in the history of women in logic—not only did she study under C.S. Peirce and was one of the first women to receive a PhD from Johns Hopkins, she also, according to many modern commentators, solved a logical problem which had plagued the field of syllogisms since Aristotle. In this paper, we revisit this claim, posing and answering two distinct questions: Which
logical problem did LaddFranklin solve in her thesis, and which problem did she \emph{think} she solved? We show that in neither case is the answer ``a longstanding problem due to Aristotle''. Instead, what LaddFranklin solved was a problem due to Jevons that was first articulated in the 19th century.
Please contact Marcus Rossberg for login information.
https://logic.uconn.edu/calendar/
Contact Information: marcus.rossberg@uconn.edu More

9/16Algebra Seminar
No meetingAlgebra Seminar
Wednesday, September 16th, 2020
No meeting
11:15 AM  12:05 PM
Storrs Campus
WebExTBA
Contact Information: mihai.fulger@uconn.edu More

9/16Math Club
Why The IRS Cares About The Riemann Zeta Function And Number Theory (And Why You Should Too!)
Steven J. Miller (Williams)Math Club
Wednesday, September 16th, 2020
Why The IRS Cares About The Riemann Zeta Function And Number Theory (And Why You Should Too!)
Steven J. Miller (Williams)
05:45 PM  06:35 PM
Storrs Campus
OnlineMany systems exhibit a digit bias. For example, the first digit base 10 of the Fibonacci numbers or of $$2^n$$ equals 1 about 30% of the time; the IRS uses this digit bias to detect fraudulent corporate tax returns. This phenomenon, known as Benford's Law, was first noticed by observing which pages of log tables were most worn from age  it's a good thing
there were no calculators 100 years ago! We'll discuss the general theory and applications, talk about some fun examples (ranging from hiding messages in images to the $$3x+1$$ problem to the Riemann zeta function as
time permits), and discuss some current open problems suitable for undergraduate research projects.
Note: Join the meeting at https://uconnvtc.webex.com/meet/mathclub
Contact Information: Keith Conrad More

9/17Mathematics Colloquium
Counting SelfAvoiding Walks On A Lattice, From Combinatorics To Physics
Hugo DuminilCopin (IHES)Mathematics Colloquium
Thursday, September 17th, 2020
Counting SelfAvoiding Walks On A Lattice, From Combinatorics To Physics
Hugo DuminilCopin (IHES)
03:30 PM  04:30 PM
Storrs Campus
OnlineA selfavoiding walk (SAW) on a graph is a path which does not visit any vertex twice. In this talk, we study an enumeration problem consisting in counting such walks of given lengths. More precisely, we will present the proof (obtained jointly with S. Smirnov) of a conjecture of Nienhuis stating that the number of SAWs of length $n$ on the hexagonal lattice grows like $\sqrt{2+\sqrt 2}^{n+o(n)}$. The proof will also shed new light on a very instructive and beautiful phase transition in the geometric properties of long SAWs.
Contact Information: KyuHwan Lee More

9/23Algebra Seminar
Combinatorics Of Cluster Algebras
Veronique BazierMatteAlgebra Seminar
Wednesday, September 23rd, 2020
Combinatorics Of Cluster Algebras
Veronique BazierMatte
11:15 AM  12:05 PM
Storrs Campus
WebExThe first part of this talk will briefly introduce cluster algebras. Cluster algebras are Laurent polynomial algebras whose generators are obtained by a recursive process called mutation. We start with a seed (a pair formed with a set a n variables called a cluster) and with a quiver (a directed graph with n vertices). The mutation of a seed replaces one variable at a time and modifies the quiver, giving therefore a new seed. The cluster algebra is generated by all variables obtained by successive mutations, called cluster variables.
The exchange graph of a cluster algebra allows to visualize relations between its clusters. In this graph, vertices correspond to cluster of the cluster algebras and edges correspond to mutations: two vertices are joined by an edge if the associated clusters are obtained one from the other by a mutation. An intuitive way to construct the exchange graph of a cluster algebra is to compute one at a time every mutation. In the second part of this talk, we will show a way to realize the exchange graph of a cluster algebra with a finite number of cluster variables in $$\mathbb R^n$$ where n represents the number of vertices in the quiver. We compute this realization directly rather than recursively.
Finally, in the last part of this talk, we prove the unistructurality of certain type of algebras. A cluster algebra is unistructural if the set of its cluster variables determine uniquely its cluster. In other words, a cluster algebra is unistructural if another cluster algebra with exactly the same cluster variables must have also the same clusters.
Contact the organizer for the WebEx link.
Contact Information: mihai.fulger@uconn.edu More

9/23Math Club
Richard Guy's Strong Law Of Small Numbers And How Not To Make Friends
Hanson Smith (UConn)Math Club
Wednesday, September 23rd, 2020
Richard Guy's Strong Law Of Small Numbers And How Not To Make Friends
Hanson Smith (UConn)
05:45 PM  06:35 PM
Storrs Campus
OnlineIn this talk we will work through a number of examples from Richard Guy's wonderful paper "The Strong Law of Small Numbers." The main theorem is "you can't tell by looking". Following Guy, we will prove this by intimidation. Audience participation, questioning, and guessing is highly encouraged. We'll conclude the talk with an exciting application to web comics.
Note: Join the meeting at https://uconnvtc.webex.com/meet/mathclub
Contact Information: Keith Conrad More

9/24Probabillity And Data Science Colloquium
Probabillity And Data Science Colloquium
Thursday, September 24th, 2020
02:00 PM  03:00 PM
Storrs Campus
OnlineWeekly colloquium with invited external speakers
Contact Information: Zhongyang Li More

9/24Mathematics Colloquium
Universes As Big Data: Superstrings, CalabiYau Manifolds And MachineLearning
YangHui He (Oxford)Mathematics Colloquium
Thursday, September 24th, 2020
Universes As Big Data: Superstrings, CalabiYau Manifolds And MachineLearning
YangHui He (Oxford)
03:30 PM  04:30 PM
Storrs Campus
OnlineWe review how historically the problem of string phenomenology lead theoretical physics first to algebraic/diffenretial geometry, and then to computational geometry, and now to data science and AI.
With the concrete playground of the CalabiYau landscape, accumulated by the collaboration of physicists, mathematicians and computer scientists over the last 4 decades, we show how the latest techniques in machinelearning can help explore problems of physical and mathematical interest, from geometry, to group theory, to combinatorics and number theory.
Contact Information: KyuHwan Lee More

9/25Math Physics Learning Seminar
Math Physics Learning Seminar
Friday, September 25th, 2020
10:00 AM  11:00 AM
Storrs Campus
onlineA probabilistic Lagrangian by Marco Carfagnini
Contact Information: Masha Gordina More

9/25Logic Supergroup: Stewart Shapiro & David McCarty
Logic Supergroup: Stewart Shapiro & David McCarty
Friday, September 25th, 2020
11:00 AM  01:00 PM
Other
onlineLogic Supergroup talk by Stewart Shapiro (OSU/UConn) & David McCarty (Indiana)
Intuitionistic Sets and Numbers: the theory SST
SST is a small intuitionistic set theory governing the hereditarily finite sets. It is based upon set induction. Simple as SST is, it seems remarkably strong: it deduceswithin intuitionistic formal logicall the axioms of ZF + AC, less the Axiom of Infinity, except that Separation is limited to decidable predicates. It is relatively straightforward to prove that SST has the usual Goedelian incompleteness properties. SST is definitionally equivalent to full, firstorder intuitionistic arithmetic, aka Heyting Arithmetic. And SST manifests the attractive metamathematical properties of many intuitionistic mathematical theoriesit supports a number of different realizability and topological interpretations and can be assumed to be categorical.
https://sites.google.com/view/logicsupergroup/thelogicsupergroup
Please contact Marcus Rossberg for login information.
Contact Information: marcus.rossberg@uconn.edu More

9/25Meaning Group: Arregui and Biezma 2016
Meaning Group: Arregui and Biezma 2016
Friday, September 25th, 2020
03:00 PM  04:00 PM
Other
onlineTeru Mizuno will be leading the discussion on the paper "Discourse Rationality and the Counterfactuality Implicature in Backtracking Conditionals" by Ana Arregui and María Biezma.
The meeting will be held online via video conference. Details are given in the email announcement and can be obtained by contacting the organizers.
Contact Information: http://meaning.linguistics.uconn.edu/ More

9/25S.I.G.M.A. Seminar
Fourier Analysis on Groups
Fabrice BaudoinS.I.G.M.A. Seminar
Friday, September 25th, 2020
Fourier Analysis on Groups
Fabrice Baudoin
03:00 PM  04:00 PM
Storrs Campus
OnlineThis talk will describe what Fourier analysis on groups is about as an advertisement for my upcoming spring semester course.
Note: To attend this talk, go to https://uconncmr.webex.com/uconncmr/j.php?MTID=m608536ca273821a31f4b5e42b2061e65
Contact Information: Bailey Johnson More

9/28PDE And Differential Geometry Seminar
Asymptotic Stability Of Harmonic Maps On The Hyperbolic Plane Under The Schrodinger Maps Evolution
Sohrab Shahshahani (UMass Amherst)PDE And Differential Geometry Seminar
Monday, September 28th, 2020
Asymptotic Stability Of Harmonic Maps On The Hyperbolic Plane Under The Schrodinger Maps Evolution
Sohrab Shahshahani (UMass Amherst)
11:00 AM  12:00 PM
Other
OnlineWe consider the Cauchy problem for the Schrodinger maps evolution when the domain is the hyperbolic plane. An interesting feature of this problem compared to the more widely studied case on the Euclidean plane is the
existence of a rich new family of finite energy harmonic maps. These are stationary solutions, and thus play an important role in the dynamics of Schrodinger maps. The main result is the asymptotic stability of (some of) such harmonic maps under the Schrodinger maps evolution. More precisely, we prove the nonlinear asymptotic stability of a finite energy equivariant harmonic map Q under the Schrodinger maps evolution with respect to
nonequivariant perturbations, provided that Q obeys a suitable linearized stability condition. This is joint work with Andrew Lawrie, Jonas
Luhrmann, and SungJin Oh.
Contact Information: zhongshan.an@uconn.edu More

9/30Algebra Seminar
VectorValued Modular Forms
Richard Gottesman (Queen's University)Algebra Seminar
Wednesday, September 30th, 2020
VectorValued Modular Forms
Richard Gottesman (Queen's University)
11:15 AM  12:05 PM
Storrs Campus
WebExI will give an introduction to vectorvalued modular forms and describe some of my results on the arithmetic of their Fourier coefficients. The collection of vectorvalued modular forms form a graded module over the graded ring of modular forms. I will explain how understanding the structure of this module allows one to show that the component functions of vectorvalued modular forms satisfy an ordinary differential equation whose coefficients are modular forms. In certain cases, one may use a Hauptmodul to transform such a differential equation into a Fuchsian differential equation on the projective line minus three points. I will explain how these ideas can be used to prove certain cases of the unbounded denominator conjecture for vectorvalued modular forms.
Please contact the organizer for the WebEx link.
Contact Information: mihai.fulger@uconn.edu More

9/30Math Club
Differentiation Under the Integral Sign
Nicholas Juricic (UConn)Math Club
Wednesday, September 30th, 2020
Differentiation Under the Integral Sign
Nicholas Juricic (UConn)
05:45 PM  06:35 PM
Storrs Campus
OnlineThe two main techniques of integration taught in calculus courses are integration by substitution and integration by parts. This talk will describe and illustrate a third technique of integration, almost never
taught in math courses, called differentiation under the integral sign. It can handle integrals that appear inaccessible to simpler methods. The physicist Richard Feynman had great affection for differentiation under the integral sign, writing once
"I caught on how to use that method, and I used that one damn tool again and again."
This talk will assume familiarity with partial derivatives from multivariable calculus.
Note: Join the meeting at https://uconnvtc.webex.com/meet/mathclub
Contact Information: Keith Conrad More