# Season’s Greetings

Season's Greetings help greetings % greetings Seasonal holiday fractal. % greetings(phi) generates a seasonal holiday fractal that depends % upon the parameter phi. The default value of phi is the golden ratio. % What happens for other values of phi? Try both simple fractions %... read more >>

# Post About 1976 SVD Film Is Available

Several days ago I accidentally triggered a premature annoucement of a post about a "1976 Matrix Singular Value Decomposition Film". Many readers who tried to find that post were greeted with an unwelcome 404 error message, "Not Found". The post is now available: Last week's post.... read more >>

# Magic Squares Meet Supercomputing

I have just returned from the huge Supercomputing 2012 conference in Salt Lake City. I can report on interesting reactions to some questions I posed in last week's blog and on some impressive speedup results when we ran the code in last week's blog on a parallel cluster in the Cloud.... read more >>

# Magic Squares, Part 3, Linear Algebra4

We know a little bit, but not much, about the linear algebraic properties of magic squares. ... read more >>

# Magic Squares, Part 1, Low Order1

With origins in centuries old recreational mathematics, magic squares demonstrate MATLAB array operations. ... read more >>

# China Trip Report4

I have just completed a wonderful trip, a two-week lecture tour of eight universities in five cities in China. I was accompanied on the trip by David Chen from the MathWorks office in Shanghai and Cecilia Liu from our Beijing office. We made a side trip to the Giant Panda Conservation Research Base, in Chengdu, Sichuan Province, central China, where we had an opportunity to meet this fellow, who is not a MATLAB user.... read more >>

# CHEBFUN, Snake2

Chebfun revives a classic video game, with a few mathematical twists (literally)... read more >>

# CHEBFUN, Roots

The ROOTS function in Chebfun is one of its most powerful features. This is the second part of my series on Chebfun. Part one is here. ... read more >>