Cleve’s Corner: Cleve Moler on Mathematics and Computing

Jahnke and Emde, Revisited

Posted by Cleve Moler,


An incredible book, published in several editions from 1909 to 1933, by German mathematicians Eugene Jahnke and Fritz Emde, contains definitions and formulas for mathematical functions, hand-calculated tables of function values, and meticulous hand-drawn 2- and 3-dimensional graphs. An English edition was published by Dover in 1945.... read more >>

Touch-Tone Telephone Dialing 8

Posted by Cleve Moler,

We all use Fourier analysis every day without even knowing it. Cell phones, disc drives, DVDs, and JPEGs all involve fast finite Fourier transforms. This post, which describes touch-tone telephone dialing, is the first of three posts about the computation and interpretation of FFTs. The posts are adapted from chapter 8 of my book, Numerical Computing with MATLAB .... read more >>

These postings are the author's and don't necessarily represent the opinions of MathWorks.