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Easter
Easter Sunday is March 31 this year. Why? How is the date of Easter determined? ...
거의 13년 전
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Wilkinson’s Polynomials
Wilkinson's polynomials are a family of polynmials with deceptively sensitive roots....
거의 13년 전
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Jim Wilkinson
I have already made several posts about gatlin, the image distributed with MATLAB of the organizing committee for the...
거의 13년 전
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Hilbert Matrices
The inverse Hilbert matrix, invhilb, has recently made surprise appearances in Cody, the programming game on MATLAB Central,...
대략 13년 전
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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...
대략 13년 전
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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...
대략 13년 전
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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...
대략 13년 전
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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
대략 13년 전
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Reduced Penultimate Remainder
I investigated the reduced penultimate remainder algorithm in an undergraduate research project under professor John Todd at...
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George Forsythe
Tuesday, January 8, 2013, would have been George Forsythe's 96th birthday. He passed away in 1972 at the age of 55. A...
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Season’s Greetings
Season's Greetings help greetings % greetings Seasonal holiday fractal. % greetings(phi) generates a seasonal...
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Post About 1976 SVD Film Is Available
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1976 Matrix Singular Value Decomposition Film
This blog is about a film that I made in 1976. Here is the link to a digital copy on YouTube:...
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Magic Squares Meet Supercomputing
I have just returned from the huge Supercomputing 2012 conference in Salt Lake City. I can report on interesting reactions...
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Magic Squares, Part 3, Linear Algebra
We know a little bit, but not much, about the linear algebraic properties of magic squares. ...
13년 초과 전
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Magic Squares, Part 1, Low Order
With origins in centuries old recreational mathematics, magic squares demonstrate MATLAB array operations. ... read more...
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China Trip Report
I have just completed a wonderful trip, a two-week lecture tour of eight universities in five cities in China. I was...
13년 초과 전
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CHEBFUN, Snake
Chebfun revives a classic video game, with a few mathematical twists (literally)...
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CHEBFUN, Roots
The ROOTS function in Chebfun is one of its most powerful features. This is the second part of my series on Chebfun....
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CHEBFUN, Numerical Computing With Functions
I recently attended "Chebfun and Beyond", a three-day workshop in Oxford, England. Chebfun is a mathematical research and...
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Game of Life, Part 3, Sampler
The Game of Life. A few more of my favorite populations....
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Game of Life, Part 2, Sparse Matrices
The Game of Life, including the infinitely expanding universe, is a gorgeous application of MATLAB sparse matrices.... read...
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Game of Life, Part 1, The Rule
This is part one of a series of posts about John Conway's Game of Life. One deceptively simple rule leads to an incredible...
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MATLAB Debut and the Potted Palm
The first MATLAB trade show booth at the CDC in December, 1984, included a potted palm....
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Can One Hear the Shape of a Drum? Part 3, Transplantation.
This is the third part of a series of posts about Marc Kac's 1966 paper in the American Mathematical Monthly [1]. This part...
13년 초과 전
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Can One Hear the Shape of a Drum? Part 2, Eigenfunctions
This is the second part of a series of posts about Marc Kac's 1966 paper in the American Mathematical Monthly [1]. This part...
13년 초과 전
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Can One Hear the Shape of a Drum? Part 1, Eigenvalues
The title of this multi-part posting is also the title of a 1966 article by Marc Kac in the American Mathematical Monthly...
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Pythagorean Addition
How do you compute the hypotenuse of a right triangle without squaring the lengths of the sides and without taking any...
13년 초과 전
