If a cryptarithm uses letters in place of digits, and the letters form words or phrases, the puzzle is an alphametic. The mathematician Charles Babbage designed an Analytical Engine, a mechanical precursor to the computer, in the late 1800s. It makes extensive use of differential equations and advanced numerical methods. An extensive annotated list of software related to Elert's Chaos Hypertextbook. Inc. A plug-in for Adobe Illustrator that automates creation of surface designs and ornaments based on seventeen wallpaper groups.
Site is in English and Italian.
Bibliography, documentation, download, history, and links to related software. U.K. A collection of wavelet filters available for download. Jr. The BNALib software package, provided in source code form, is a toolbox of subroutines, functions, and demonstration programs that provide numerical analysis computing capability for Visual Basic programmers. Also a way of calculating Pi. Read descriptions, or download sample programs.