Chemistry affects every area of our lives. Here is just one example of chemistry in action – the making of soaps. Soap was once made by boiling animal fat in ashes – the product was hard on the skin and … Seguir Leyendo…

Today, images and video are everywhere. Online photo sharing sites and social networks have them in the billions. Search engines will produce images of just about any conceivable query. Practically all phones and computers come with built in cameras. It … Seguir Leyendo…

GNU Prolog is a free Prolog compiler with constraint solving over finite domains developed by Daniel Diaz. For recent information about GNU Prolog please consult the GNU Prolog page. GNU Prolog is a Prolog compiler based on the Warren Abstract … Seguir Leyendo…

This book is designed to be a textbook for graduate-level courses in approximation algorithms. After some experience teaching minicourses in the area in the mid-1990s, we sat down and wrote out an outline of the book. Then one of us … Seguir Leyendo…

Ruby is an easy to learn programming language, it was invented by a guy named Matz in Japan. Ruby is a free software and can be used by any one for zero cost. Ruby’s popularity was initially confined to Japan, … Seguir Leyendo…