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Kuramoto Oscillators
Kuramoto Oscillators I have blogged before about the work Indika Rajapakse, Steve Smale and I are doing to investigate the stability of Kuramoto oscillators....
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Velvel Kahan
Velvel Kahan's informal name in Yiddish, װעלװעל, means "little wolf." If he needs a more formal name, Velvel uses William. Contents First Meeting Anonymous Referee Close enough Householder VII...
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Beresford Parlett
Linocuts by Henk van der Vorst. Beresford Parlett passed away last Saturday, February 7. He was 93 years old. I have known him since graduate school at Stanford. Contents Stanford Career Holy Grail...
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Double Pendulum
I was amazed by two recent YouTube videos about the double pendulum. Contents Double Pendulum Cleve's Lab Drew's Campfire 2Swap Double Pendulum The classic double pendulum consists of one pendulum...
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SVD Measures Partisanship in the U. S. Senate
My first blog about SVD and Partisanship in the U. S. Senate was five years ago. Today's post updates that to 2025. Contents SVD Measures Partisanship The Senate The Data The Matrices Partisanship...
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New York Times Colors
I admire the color scheme in the New York Times Games section and occasionally make it my colororder. https://www.nytco.com/games Contents Colormaps Palettes Color Order New York Times Games NYT Color...
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Rob Schreiber
Rob Schrieber is one of my very best friends. Contents Career Hewlett-Packard Sparse SIAM NAS Benchmarks Cerebras Career 1977 Ph. D., Yale. 1979-1985 Assistant Professor, Stanford. 1984-1987 Chief...
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Nick Trefethen
Nick Trethen is a world famous computational scientist and my good friend. Contents Serra House Nick Academic Career Wilkinson 60th Birthday Chebfun 100 Digits Lightning Laplace Solver AAA Body-Mass...
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Jack Dongarra
Jack Dongarra is my student, colleague and friend. Contents Turing Award Jack PC-AT Argonne New Mexico Accidental Benchmark Spokesman SC Conference ICL Tradition Turing Award The ACM Turing Award is...
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Pete Stewart
Pete Stewart is one of my closest colleagues. Contents Pete LINPACK Householder Old Timers Bibliograhy Collected Works Oral History Pete Pete's formal name is Gilbert W. Stewart. So why do we all call...
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Tangram Puzzles
The tangram is an ancient Chinese puzzle with seven pieces. Contents Deluxe Schools Figures Puzzle Kitty Swan Square Web Deluxe Deluxe, wooden editions are available. imshow('Wooden.jpg') Schools...
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Travel Report, JUIT, India
I was invited recently to give a virtual talk to the student chapter of SIAM at JUIT, the Jaycee Institute of Information Technology, in Wagnaghat, India. Contents Map Himalayas Campus Hosts Students...
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Wordler and I Fail on Puzzle 1497
Like millions of other folks, I play Wordle from the New York Times almost every day. The Times reports that Wordle puzzle number 1497 on Friday, July 25, was especially difficult. The average puzzler...
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My Favorite MATLAB Demos
In 1988, while I was with Ardent Computer in Silicon Valley, I gave a talk that previewed MATLAB graphics. The title was "Pictures of Matrices". At the time, a mathematician friend of mine asked. Why...
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Trip Report, Householder XXII
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...
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A Million Dollar Matrix
The twenty-second Householder Symposium on Numerical Linear Algebra is this week, June 8 - June 13, 2025 at Cornell. My talk on Wednesday had the provocative title "A Million-Dollar Matrix". A PDF of...
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Revolving Century Puzzle and Magic Squares
The Revolving Century puzzle is a beautifully made wooden puzzle from Creative Crafthouse in Hudson, Florida. The sum of the numbers on each of the six rotating puzzle pieces is 100. The goal is to...
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L-systems, Plants, Fractal Curves, Turtles and Dragons
No, this is not the script for an episode of "Game of Thrones". It is a blog post about Lindenmayer grammars, growing plants, space-filling fractals, turtle graphics and dragon curves. Here is the...
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The Hat, a Tridecagon Aperiordic Monotile
Two years ago, in March of 2023, an unlikely team of mathematical hobbyists announced the discovery of a remarkable 13-sided polygon that they nick-named the "Hat". Today, a Google search for the...
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