A couple of questions in comments on recent blog posts have prompted me to discuss matrix condition numbers.... read more >>

# What is the Condition Number of a Matrix? 1

Posted by **Cleve Moler**,

**Category:**- Matrices,
- Numerical Analysis,
- Performance

Blogs

Posted by **Cleve Moler**,

A couple of questions in comments on recent blog posts have prompted me to discuss matrix condition numbers.... read more >>

**Category:**- Matrices,
- Numerical Analysis,
- Performance

Posted by **Cleve Moler**,

The Householder meetings on Numerical Linear Algebra have been held roughly every three years since 1961. The twentieth, with the logo **HHXX**, was held June 18th through 23rd at Virginia Tech in Blacksburg, Virginia. I've been to 17 of the meetings. They have been an important part of my professional life and I've written Cleve's Corner articles and blog posts about them, MathWorks News & Notes, and Householder XIX.... read more >>

Posted by **Cleve Moler**,

I first encountered the Hilbert matrix when I was doing individual studies under Professor John Todd at Caltech in 1960. It has been part of my professional life ever since.... read more >>

**Category:**- History,
- Matrices,
- Precision,
- Symbolic

Posted by **Cleve Moler**,

The floating point arithmetic format that requires only 16 bits of storage is becoming increasingly popular. Also known as *half precision* or *binary16*, the format is useful when memory is a scarce resource.... read more >>

Posted by **Cleve Moler**,

A MATLAB object for arithmetic with Roman numerals provides an example of object oriented programming. I had originally intended this as my April Fools post, but I got fascinated and decided to make it the subject of a legitimate article.... read more >>

Posted by **Cleve Moler**,

The adjacency matrix of a hypercube demonstrates the new MATLAB graph object.... read more >>

**Category:**- Eigenvalues,
- Fun,
- Graphics,
- History,
- Matrices

Posted by **Cleve Moler**,

When I was in high school in the 1950's, I didn't know anything about matrices. But I nearly encountered one when I wrote a paper for my physics class about the color scheme that allowed new color TV broadcasts to be compatible with existing black-and-white TV receivers.... read more >>

Posted by **Cleve Moler**,

(Please replace the erroneous posting from yesterday, Nov. 28, with this corrected version.)... read more >>

**Category:**- Matrices,
- People,
- Singular Values

Posted by **Cleve Moler**,

Here is a very short course in Linear Algebra. The Singular Value Decomposition provides a natural basis for Gil Strang's Four Fundamental Subspaces.... read more >>

**Category:**- Matrices,
- People,
- Singular Values

Posted by **Cleve Moler**,

This is a follow-up to my previous follow-up, posted several days ago. A very careful reader, Bruno Bazzano, contributed a comment pointing out what he called "a small typo" in my code for the classic Gram-Schmidt algorithm. It is more than a small typo, it is a serious blunder. I must correct the code, then do more careful experiments and reword my conclusions.... read more >>

**Category:**- Algorithms,
- Magic Squares,
- Matrices,
- Numerical Analysis

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