Trip Report, Householder XXII - Cleve Moler on Mathematics and Computing
 

The twenty-second Householder Symposium on Numerical Linear Algebra was held June 8 - June 13 at Cornell. The local organizers were Anil Damle, Alex Townsend and David Bindel. Anil served as host and cheerleader.

[URL="https://blogs.mathworks.com/cleve/2025/06/12/a-million-dollar-matrix/"]My talk[/URL] was Wednesday morning. Here is the complete [URL="https://householder-symposium.github.io/schedule.html"]schedule[/URL].

[B]Contents[/B]
[LIST][*][URL="#f402423b-cb81-4e90-93ab-76eebe7e3bff"]Group Selfie[/URL][*][URL="#900d99fc-07f7-4a8c-a630-0e6c7f347a8c"]Poster Session[/URL][*][URL="#ef80a124-71d5-4978-82d7-cd69347d59c9"]Quantum Computing[/URL][*][URL="#650df2ca-6b59-4e9d-b3b9-f02a4cf2bb10"]Householder Prizes[/URL][*][URL="#af59e9bd-360d-4e8c-9096-dd5f227784ea"]Excursion[/URL][*][URL="#928e34bb-faf3-4382-960a-704094ecbfe4"]Grüezi[/URL][*][URL="#f6f32e88-3fc4-4287-93d4-17b877519b2b"]Thanks[/URL][/LIST][B]Group Selfie[/B]

Anil and Erik De Sturle orchestrated this group selfie. Can you find me? Do you recognize anyone else?

[IMG]https://blogs.mathworks.com/cleve/files/HXXII_selfie.png[/IMG]

[B]Poster Session[/B]

The Tuesday evening poster session was a high point of the meeting. Over 50 posters were set up in the Statler Terrace. We mingled, drank beer, ate ice cream and discussed the posters with their authors. I was impressed by the number of young people doing exciting work.

[IMG]https://blogs.mathworks.com/cleve/files/Posters.png[/IMG]

[B]Quantum Computing[/B]

A poster by Christine Tobler from MathWorks described the MATLAB Support Package for Quantum Computing. One model of a hypothetical quantum computer involves a state vector of probabilities and multiplication by unitary matrices.
[LIST][*][URL]https://www.mathworks.com/content/dam/mathworks/handout/quantum-computing-cheat-sheet.pdf[/URL].[/LIST][IMG]https://blogs.mathworks.com/cleve/files/Christine.png[/IMG]

A second poster by Sophia Keip, visiting Lawrence Berkeley National Laboratory from Fern Universität in Hagen, Germany, and a plenary talk by Roel Van Beeumen from LBL, described QCLAB, another MATLAB quantum toolbox
[LIST][*][URL]https://github.com/QuantumComputingLab/qclab[/URL].[/LIST][IMG]https://blogs.mathworks.com/cleve/files/QCLAB_poster.jpg[/IMG]

[B]Householder Prizes[/B]

The Alston S. Householder Prize is awarded to the author of the best dissertation in numerical linear algebra submitted over the previous three years. This time there were two prize-winning submissions described in a special plenary session on Thursday evening.

Alice Cortinovis from the University of Pisa won the prize for a dissertation supervised by Daniel Kressner from the Swiss Federal Institute of Technology in Lausanne.

[IMG]https://blogs.mathworks.com/cleve/files/Alice.png[/IMG]

Jorge Garza-Vargas from Caltech and Jess Banks from U. C. Berkeley shared a second prize for a pair of dissertations supervised by Nikhil Srivastava from Berkeley. Jorge gave the talk.

[IMG]https://blogs.mathworks.com/cleve/files/Jorge.png[/IMG]

[B]Excursion[/B]

A tradition at the seminars is the Wednesday afternoon excursion. This year we had the choice of a serious hike, an easy walk, a visit to a nearby winery, or a nap at the hotel. The walk was on the Gorge trail in Taughannock Falls State Park and was fabulous.

[IMG]https://blogs.mathworks.com/cleve/files/Taughannock.png[/IMG]

[B]Grüezi[/B]

Grüezi is Swiss German for Hello. Anyone planning to attend the Householder seminar in 2028 should learn how to pronounce Grüezi. The seminar will be in Pontresina, Switzerland. Bart Vandereycken made the announcement.

[IMG]https://blogs.mathworks.com/cleve/files/Pontresina.png[/IMG]

Pontresina was also the site for the Householder seminar in 1996. The Wednesday excursion at that meeting was a hike down the Morteratsch glacier at Diavolezza.

[IMG]https://blogs.mathworks.com/cleve/files/Glacier.png[/IMG]

[B]Thanks[/B]

Thanks to Erik De Sturle for several of these photos.

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