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*'''When:''' Fridays at 2:25pm (except as otherwise indicated)
*'''When:''' Fridays at 2:25pm (except as otherwise indicated)
*'''Where:''' 901 Van Vleck Hall
*'''Where:''' 901 Van Vleck Hall
*'''Organizers:''' [https://math.wisc.edu/staff/fabien-maurice/ Maurice Fabien], [https://people.math.wisc.edu/~rycroft/ Chris Rycroft], and [https://www.math.wisc.edu/~spagnolie/ Saverio Spagnolie],
*'''Organizers:''' [https://www.math.wisc.edu/~spagnolie/ Saverio Spagnolie], [https://people.math.wisc.edu/~rycroft/ Chris Rycroft], and [https://sites.google.com/view/laurel-ohm-math Laurel Ohm]  
*'''To join the ACMS mailing list:''' Send mail to [mailto:acms+join@g-groups.wisc.edu acms+subscribe@g-groups.wisc.edu].
*'''To join the ACMS mailing list:''' Send mail to [mailto:acms+join@g-groups.wisc.edu acms+subscribe@g-groups.wisc.edu].


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<br>   


== '''Fall 2024''' ==
== '''Fall 2025''' ==
{| class="wikitable"
{| cellpadding="8"
|+
! align="left" |Date
!Date
! align="left" |Speaker
!Speaker
! align="left" |Title
!Title
! align="left" |Host(s)
!Host(s)
|-
|-
|Sep 13
|Sep 19*
|[https://people.math.wisc.edu/~nchen29/ Nan Chen] (UW)
|[https://www.anl.gov/profile/zichao-di Zichao (Wendy) Di] (Argonne National Laboratory)
|Intro. to Uncertainty Quantification (UQ) (tutorial)
|TBD
|Rycroft/Li
|-
|Sep 26
|[https://scholar.google.com/citations?user=Imuw5CMAAAAJ&hl=en&oi=ao Pouria Behnoudfar] (UW)
|TBD
|Spagnolie
|Spagnolie
|-
|-
|Sep 20
|Oct 3
|[https://knewhall.web.unc.edu Katie Newhall] (UNC Chapel Hill)
|
|Energy landscapes, metastability, and transition paths
|
|
|-
|Oct 10*
|[https://www.alexandriavolkening.com Alexandria Volkening] (Purdue)
|TBD
|Rycroft
|Rycroft
|-
|-
|Sep 27
|Oct 17*
|[https://ptg.ukzn.ac.za Indresan Govender] (Mintek / Univ. of KwaZulu-Natal, South Africa)
|
|
|
|Rycroft
|-
|Oct 4*
|[https://sse.tulane.edu/math/people/hongfei-chen Hongfei Chen] (Tulane)
|
|
|Jean-Luc
|-
|-
|Oct 11 '''Colloquium in B239 at 4:00pm'''
|Oct 24
|[https://people.math.ethz.ch/~imikaela/ Mikaela Iacobelli] (ETH/IAS)
|[https://cims.nyu.edu/~oneil/ Mike O'Neil] (Courant)
|[[# TBA|  TBA  ]]
|TBD
|Li
|Spagnolie
|-
|-
|Oct 18 '''Colloquium in B239 at 4:00pm'''
|Oct 31
|[https://galton.uchicago.edu/~guillaumebal/ Guillaume Bal] (U Chicago)
|[https://people.math.wisc.edu/~hhong78/ Hyukpyo Hong] (UW)
|[[# TBA|  TBA  ]]
|TBD
| Li, Stechmann
|Spagnolie
|-
|-
|Oct 25
|Nov 7*
|[https://www.cs.cornell.edu/~damle/ Anil Damle] (Cornell)
|[https://thales.mit.edu/bush/ John Bush] (MIT)
|Fine-grained Theory and Hybrid Algorithms for Randomized Numerical Linear Algebra
|TBD
|Li
|Spagnolie
|-
|-
| Nov 1
|Nov 14
|[https://research-hub.nrel.gov/en/persons/michael-sprague Michael Sprague] (NREL)
|[https://sites.google.com/andrew.cmu.edu/yukunyue/home Yukun Yue] (UW)
|[[# TBA|  TBA  ]]
|TBD
|Spagnolie
|Spagnolie
|-
|-
| Nov 8
|Nov 21*
|[https://personal.math.ubc.ca/~holmescerfon/ Miranda Holmes-Cerfon] (UBC)
|[https://jesnial.github.io/ Jessie Levillain] (CNES/INSA Toulouse)
|TBD
|Ohm
|-
|Nov 28
|Thanksgiving
|
|
|
|Stechmann
|-
|-
| Nov 15*
|Dec 5
| [http://sun-yue.com Yue Sun] (UW–Madison)
|
|
| Rycroft
|-
| Nov 22
|[https://ibd.uchicago.edu/joinus/yenfellowship/ Ondrej Maxian] (U Chicago)
|[[# TBA|  TBA  ]]
|Ohm & Spagnolie
|-
| Nov 29*
|''Thanksgiving''
|
|
|
|
|-
|-
| Dec 6
|Dec 12
|[https://www.simonsfoundation.org/people/ido-lavi/ Ido Lavi] (Flatiron)
|[https://sites.google.com/a/brandeis.edu/tfai/home Thomas Fai] (Brandeis)
|[[# TBA|  TBA  ]]
|TBD
|Spagnolie
|Rycroft
|}
|}
''[Dates marked with an asterisk are close to weekends with a home game for the [https://uwbadgers.com/sports/football/schedule UW Badgers football team]. Hotel availability around these dates is often limited if booked on short notice.]''


Dates marked with an asterisk correspond to [https://uwbadgers.com/sports/football/schedule home football games of the UW–Madison Badgers]. On these dates it can be difficult to get a hotel room close to campus at short notice.
==Abstract==


== Abstracts ==
<div id="Chandler"><div id="Fraser"><div id="Luedtke"><div id="Zhdankin"><div id="Boffi"><div id="Shankar"><div id="Loevbak">
====Nan Chen (UW–Madison)====
<div id="Lu"><div id="Vogman"><div id="Cockburn">
Title: Taming Uncertainty in a Complex World: The Rise of Uncertainty Quantification -- A Tutorial for Beginners
== Archived semesters ==
 
I will provide a tutorial about uncertainty quantification (UQ) for those who have no background but are interested in learning more about this area. The talk will exploit many elementary examples, which are understandable to graduate students and senior undergraduates, to present the ideas of UQ. Topics include characterizing uncertainties using information theory, UQ in linear and nonlinear dynamical systems, UQ via data assimilation, the role of uncertainty in diagnostics, and UQ in advancing efficient modeling. The surprisingly simple examples in each topic explain why and how UQ is essential. Both Matlab and Python codes have been made available for these simple examples.
 
'''Katie Newhall (UNC Chapel Hill)'''
 
Title: Energy landscapes, metastability, and transition paths
 
The concept of an energy landscape emerged in the 1930’s as a way to calculate chemical reaction rate constants via Henry Eyring’s transition state theory. Its use has expanded since then, remaining central to quantifying metastability (infrequent jumps between deterministically-stable, energy minimizing, states) that arises in noisy systems when the thermal energy is small relative to the energy barrier separating two states. In this talk, I will present extensions of this theory that I have developed and applied to physical and biological systems. The first is an infinite dimensional system for which I prove metastability is present in the absence of an energy barrier; I extend transition state theory to compute mean transition times. In the second, I derive a model for a spatially-extended magnetic system with spatially-correlated noise designed to sample the Gibbs distribution relative to a defined energy functional. In the third, I show a quasi-potential can be found and used to describe metastable transitions between stable clusters in a bead-spring polymer model of chromosome dynamics with additional stochastic binding pushing the system out of equilibrium.
 
==== Anil Damle (Cornell)====
Title: Fine-grained Theory and Hybrid Algorithms for Randomized Numerical Linear Algebra
 
Randomized algorithms have gained increased prominence within numerical linear algebra and they play a key role in an ever-expanding range of problems driven by a breadth of scientific applications. In this talk we will explore two aspects of randomized algorithms by (1) providing experiments and accompanying theoretical analysis that demonstrate how their performance depends on matrix structures beyond singular values (such as coherence of singular subspaces), and (2) showing how to leverage those insights to build hybrid algorithms that blend favorable aspects of deterministic and randomized methods. A focus of this talk will be on methods that approximate matrices using subsets of columns. Relevant motivating applications will be discussed and numerical experiments will illuminate directions for further research.
 
== Future semesters ==


*[[Applied/ACMS/Spring2025|Spring 2025]]
*[[Applied/ACMS/Fall2024|Fall 2024]]
*[[Applied/ACMS/Fall2024|Fall 2024]]
*[[Applied/ACMS/Spring2025|Spring 2025]]
== Archived semesters ==
*[[Applied/ACMS/Spring2024|Spring 2024]]
*[[Applied/ACMS/Spring2024|Spring 2024]]
*[[Applied/ACMS/Fall2023|Fall 2023]]
*[[Applied/ACMS/Fall2023|Fall 2023]]

Latest revision as of 17:42, 17 August 2025


Applied and Computational Mathematics Seminar


Fall 2025

Date Speaker Title Host(s)
Sep 19* Zichao (Wendy) Di (Argonne National Laboratory) TBD Rycroft/Li
Sep 26 Pouria Behnoudfar (UW) TBD Spagnolie
Oct 3
Oct 10* Alexandria Volkening (Purdue) TBD Rycroft
Oct 17*
Oct 24 Mike O'Neil (Courant) TBD Spagnolie
Oct 31 Hyukpyo Hong (UW) TBD Spagnolie
Nov 7* John Bush (MIT) TBD Spagnolie
Nov 14 Yukun Yue (UW) TBD Spagnolie
Nov 21* Jessie Levillain (CNES/INSA Toulouse) TBD Ohm
Nov 28 Thanksgiving
Dec 5
Dec 12 Thomas Fai (Brandeis) TBD Rycroft

[Dates marked with an asterisk are close to weekends with a home game for the UW Badgers football team. Hotel availability around these dates is often limited if booked on short notice.]

Abstract

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