Recursos de colección
The Wolfram Functions Site, Repository hosted at UIUC (88.000 recursos)
Wolfram Research's Mathematical Functions provides the mathematical and scientific community with a unified resource of information about mathematical functions. The interrelationships between the special functions of mathematical physics and the elementary functions of mathematical analysis as well as the interrelationships between the functions in each group are also detailed. The Functions were created and are maintained with additional sponsorship from the National Science Foundation.