Mathematical Institute Calendar

Wednesday, December 7, 2022

11:00-12:00

HFG-409

What is a sheaf on a log scheme X? If we take the ordinary etale topology, we ignore the log structure. Taking the log étale topology, even the structure "sheaf" O_X is not a sheaf! The same goes for M_X, \overline M_X. We introduce a new "rhizomic" topology on log schemes coarser than the log etale topology. Will this be enough?

AG seminar webpage: https://webspace.science.uu.nl/~piero001/index_AG_seminar.html

AG seminar webpage: https://webspace.science.uu.nl/~piero001/index_AG_seminar.html

Thursday, December 8, 2022

11:00-12:00

Minn-3.12

Guest-lecture

Prof.dr. Joo Ho Choi (Korea Aerospace University) - Bayesian methods for uncertainty quantification

see description

**Abstract:Bayesian Methods for Uncertainty Quantification **

This presentation discusses Bayesian theory andits applications in the field of reliability engineering. It addresses thebasic theory, philosophy, and simulation techniques to compute the posteriordistribution such as Markov Chain Monte Carlo and Particle Filtering methods.Application examples are the life prediction of Lithium-ion batteries, bladesin turbine engine, computer model calibration with uncertainty using real data,and crack growth prediction of aircraft structures.

16:00-17:00

HFG 6.11

Applied Mathematics Seminar -- Yves van Gennip (TUDelft) -- Some of the many faces of graph-based MBO

see description

In 1992 Merriman, Bence, and Osher introduced a threshold dynamics scheme (later named the MBO scheme) for the approximation of flow by mean curvature. This scheme has proven to be very versatile and in the last decade its graph-based variants have found usage in many applications. In this talk we will take a look at some of those applications, such as graph clustering, maximum cut computations, signed graph clustering, and modularity optimisation. We will also discuss the relationship between graph-based MBO and the graph-based Allen--Cahn equation.

Saturday, December 10, 2022

Thursday, December 15, 2022

16:00-17:00

KBG Pangea

The talk will be followed by drinks in the HFG library.

Friday, December 16, 2022

11:00-12:00

KBG Pangea

Second lecture: De Rham complexes in mixed characteristic I

More info on the Kan memorial lectures:__https://utrechtgeometrycentre.nl/daniel-kan-memorial-lectures/__

More info on the Kan memorial lectures:

14:00-15:00

KBG Pangea

Third lecture: De Rham complexes in mixed characteristic II

More info on the Kan memorial lectures:__https://utrechtgeometrycentre.nl/daniel-kan-memorial-lectures/__

More info on the Kan memorial lectures:

Wednesday, January 11, 2023

Thursday, January 12, 2023

16:00-17:00

HFG 611

**Title**: Modeling the impact of Corona measures

**Abstract**: In this talk, I will discuss a model we have developed for the ministry of Health, Welfare and Sports to estimate the impact of Corona ticket measures (QR-code) on the spread of SARS-CoV-2 in the Netherlands. I will discuss how the underlying assumptions lead to the model formulation and I will briefly discuss some results.

Tuesday, January 17, 2023

16:00-17:00

HFG611

TBA

Website of the UGC seminar (and the pure side of the MI-alks):__http://utrechtgeometrycentre.nl/ugc-seminar/__ Practical details will be sent by email to the staff and student mailing lists a few days before the event.

Website of the UGC seminar (and the pure side of the MI-alks):

Wednesday, January 18, 2023

10:00-12:00

HFG-409

Friday, January 20, 2023

Thursday, January 26, 2023

Friday, January 27, 2023

Wednesday, February 1, 2023

11:00-12:00

HFG-409

Tuesday, February 7, 2023

16:00-17:00

HFG611

Website of the UGC seminar (and the pure side of the MI-alks):

Wednesday, February 8, 2023

13:30-14:30

HFG-409

Thursday, February 9, 2023

Thursday, February 23, 2023

Wednesday, March 15, 2023

13:30-14:30

HFG-409

Wednesday, March 22, 2023

13:30-14:30

HFG-409