Rubik's Cube is one of the great mathematical puzzles of all time. Most people are just interested in solving Rubik's Cube rapidly, but deeper investigation reveals a rich mathematical and computational structure. A digital Rubik's Cube simulator provides a laboratory for the study of linear algebra, group theory, data structures and computer graphics....read more >>

The answer:A\Ais alwaysI, except when it isn't....read more >>

我最近沉迷于立方体在这个博客已经勒d me back to Rubik's cube, perhaps the greatest mathematical puzzle of all time....read more >>

Matrices in action....read more >>

SeeCubeandTeapot....read more >>

Use a cube instead of the Utah Teapot inmy previous post. I was pleasantly suprised by the final screen shot....read more >>

Matrices like the ones shown in the following screen shots are at the heart of computer graphics. They describe objects moving in three-dimensional space. MATLAB's Handle Graphics uses them. So does MathWork's newRoadRunnereditor. And so do all popular video games and CAD packages....read more >>

I am giving a five-minute talk today, May 26, at the virtual seminar onComplexity of Matrix Computations. Here are my slides. Two new MATLAB functions, tred and imtql, instrumented to count flops, are available insymeig.m....read more >>

Computing Eigenvalues of Symmetric MatricesSee revision.Get the MATLAB code (requires JavaScript) Published with MATLAB®...read more >>

This is about linear systems with fewer equations than variables;A*x = bwhere them-by-nmatrixAhas fewer rows that columns, som < n. I have always called such systemswideorfat, but this is not respectful. So I consulted the Merriam-Webster Thesaurus and foundcommodious....read more >>