Cleve’s Corner: Cleve Moler on Mathematics and ComputingScientific computing, math & more

Posts 1 - 10 of 18

Color Cube Meets Rubik’s Cube

I have made a half dozen blog posts about Rubik's Cube so far this year. And, during the MATLAB Central Mini Hack in October, I resurrected an old code about the Color Cube. Now, a combination of the two, Rubik/Color Qube, creates an elegant tool for investigating Matrices in Action.... 続きを読む >>

Christian Reinsch, Roland Bulirsch, and the SVD2

Christian Reinsch and Roland Bulirsch both passed away recently, Reinsch on October 8 and Bulirsch on September 21. Reinsch was 88 years old and Bulirsch was 89. Both of them were retired professors of numerical analysis at the Technical University of Munich. Both of them were friends of mine. But in almost all other ways, they were very different people.... 続きを読む >>

An Interactive Version of colorcubes

A 231-character static version of colorcubes in the current MiniHack generated quite a bit of interest. So I am posting the full version, where you can change number of cubes and the view point, at this link.... 続きを読む >>

modfun, A Short Program Produces Impressive Graphics4

This nifty graphics gem started with a contribution by Paul Villain to the MATLAB 2022 Mini Hack, currently taking place on MATLAB Central.... 続きを読む >>

Trio, A Wooden Puzzle from the Czech Republic2

"Clever Toys" is a puzzle company in the Czech Republic. Their Web site describes five different hand-made, wooden puzzles that are related mathematically to the Rubik's Cube.... 続きを読む >>

Rubik’s Cube Superflips and God’s Number

• How hard is it to solve a Rubik's Cube?
• When can you say that your Rubik's Cube is completely scrambled?
• Why might the answer depend on where you went to school?
• What interesting mathematical questions are involved?
... 続きを読む >>

Polygons, Polyshapes and Puzzles2

Until recently, I knew nothing about the polyshape object in MATLAB. Now I can use polyshape to simulate an extraordinary puzzle.... 続きを読む >>

An Interesting, and Perhaps New, Matrix1

I do not recall having seen this matrix before, but I will not be surprised to learn that somebody else already knows all about it, especially if that person's name is Nick.... 続きを読む >>

The Soma Cube, Again3

The Soma Cube brings back memories.... 続きを読む >>

Rotation Matrices3

The matrices in the following animations are at the heart of computer graphics. They describe objects moving in three-dimensional space and are essential to MATLAB's Handle Graphics, to Computer Added Design packages, to Computer Graphics Imagery in films, and to most popular video games. Many modern computers contain GPUs, Graphic Processing Units, which are optimized to compute the product of these matrices.... 続きを読む >>

Posts 1 - 10 of 18