Forthcoming events in this series


Tue, 24 Oct 2017

13:00 - 14:00
C1

Applications of R-graphs to DNA modelling

Agnese Barbensi
Abstract

Finding implementable descriptions of the possible configurations of a knotted DNA molecule has remarkable importance from a biological point of view, and it is a hard and well studied problem in mathematics.
Here we present two newly developed mathematical tools that describe the configuration space of knots and model the action of Type I and II Topoisomerases on a covalently closed circular DNA molecule: the Reidemeister graphs.
We determine some local and global properties of these graphs and prove that in one case the graph-isomorphism type is a complete knot invariant up to mirroring.
Finally, we indicate how the Reidemeister graphs can be used to infer information about the proteins' action.

Tue, 10 Oct 2017

13:00 - 14:00
C1

Multiparameter persistent homology: applications and algorithms

Nina Otter
Abstract

In this talk I will first briefly introduce 1-parameter persistent homology, and discuss some applications and the theoretical challenges in the multiparameter case. If time remains I will explain how tools from commutative algebra give invariants suitable for the study of data. This last part is based on the preprint https://arxiv.org/abs/1708.07390.
 

Tue, 02 May 2017

13:00 - 14:00
C1

Abstract complexes

Nina Otter
Abstract

I will give an overview of the complexes used in algebraic topology using the language of abstract complexes.

This is a lunch seminar, so feel free to bring your lunch along!

 

Tue, 07 Mar 2017

13:00 - 14:00
N3.12

Sequences

TBA
Tue, 14 Feb 2017

13:00 - 14:00
N3.12

Euler calculus

N. Otter and B. Mahler
Tue, 15 Nov 2016
13:00
C4

Introduction

Barbara Mahler, Nina Otter and Bernadette Stolz.
Abstract

 In the first meeting of the seminar we, and all participants who wish to do so, will each briefly introduce ourselves and our research interests. We will decide future talks and papers to read during this meeting.