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Department of Mathematics Colloquium 2022 Spring

 
 
                                                                                                  Iowa State University
                                                                                Department of Mathematics Colloquium
                                                                                                      2022 Spring Semester
 


                                                                                           Tuesdays 4:10pm-5:00pm
                                                                                               (In Person OR Virtual)

In Person

Location: Carver 202

Virtual 

Zoom Link:  https://iastate.zoom.us/j/93273486459?pwd=THFDQmo4NVJxTkZTZlFDMEhacU9EZ… 
   

(Or, go to https://iastate.zoom.us/join and enter meeting ID: 932 7348 6459 and password: 963505 )

   

 
The ISU Department of Mathematics Colloquium is organized by Pelin Guven Geredeli (peling@iastate.edu)
 
 


Spring 2022
 

January 18

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February 1

 

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February 8

 

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February 15

Domenico D'Alessandro (ISU)

Title: Symmetry reduction in sub-Riemannian geometry with applications to quantum systems

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February 22

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March 1

Department Meeting

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March 8

Department Meeting

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March 15

 

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March 22

 

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March 29

Mikos Bona (University of Florida)

Title: Pattern Avoiding Permutations Something Old, Something New

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The theory of permutation patterns studies subsequences of permutations that behave in a prescribed way. It is a relatively young field that has seen tremendous progress in the last 30 years. In the first half of the talk, we will give an overview of the most important results and unsolved problems. Then we will discuss much more recent results.

One of them is a set of negative results, which provide some intutitive explanation as to why these problems are so difficult. Briefly, in most cases, we can prove that the relevant generating functions are not nice, even though we do not explicitly know what they are. The other family of questions is about a set of problems that have ”no right to be interesting” as they sound somewhat artificial, but provide extremely interesting numerical evidence, suggesting that there may be something interesting lurking below the surface after all.

The talk will be accessible to graduate students.

Link: In Person

April 5

Martin Grothaus (TU Kaiserslautern)

Title: Hypocoercivity for non-linear infinite-dimensional degenerate stochastic differential equations

Abstract: Motivated by problems from Industrial Mathematics we further developed the concepts of hypocoercivity. The original concepts needed Poincaré inequalities and were applied to equations in linear finite-dimensional spaces. Meanwhile we can treat equations in manifolds or even infinite dimensional spaces. The condition giving micro- and macroscopic coercivity we could relax from Poincaré to weak Poincaré inequalities. In this talk an overview and many examples are given.

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April 12

 

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April 19

 

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April 26

 

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May 3

Edinah Gnang (Johns Hopkins University)

Title: A proof of the Kotzig–Ringel–Rosa Conjecture

Abstract: We describe a proof of the long standing Kotzig–Ringel–Rosa conjecture also known as the graceful labeling conjecture. The proof stems from a functional reformulation of the conjecture and a new composition lemma. We will also discuss how the composition lemma sheds light on a stronger variant of the Kotzig–Ringel–Rosa conjecture.

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May 10

 

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