hello, I made a program called inverter, it can be fetched at http://www.lacim.uqam.ca/~plouffe/inverter.txt what it does : from within a Maple (7 or 8) session you can access the plouffe's inverter and make some request to the web site, of course you need an internet connection to do it and maple. The program is self-contained and anyone can use it as long as you have Maple, it has been tested on a PC, a linux machine and a variety of other platforms. So far everything is according to design. there are 3 functions : pilook( ) , it does a lookup to the inverter and returns 1 answer (the shortest if any). pismart () will do 140 lookups with 1 number if K is the constant then a variety of variations on K are made and tested against the database (201 million entries). pidev( ) will try to find a rational polynomial for the expansion of K in 17 kind of expansions (like binary, fibonacci representation, continued fractions and egyptian fraction expansion). -------------------------------------------------------------------------------- pilll ( ) is NOT yet implemented but it will do a variety of integer relation searchs with K, I am trying to tune a fast program with only maple (wishful thinking). Also : the O.E.I.S. is imbeded into the database of constants and some answers will point to some sequences or a transformed sequence, so far I did not made a link to it but it can be made if Neil Sloane agrees to that (ok Neil ?). Finally, this first version does NOT use GFUN for trying to find a generating function when pidev is called but my intention is to include the source later. I had a prototype of a program for the OEIS that does the same and could be included, the function is eislook ( ). -------------------------------------------------------------------------- - it is free. - you can make many requests to the server as long as it is not abusive, the machines can take a good load of requests. - the program can be copied any number of time as long as you mention the source. --------------------------------------------------------------------------- Instructions to use : 1) download the file to your pc (rename it inverter). 2) put the file in the bin.wnt or bin.win folder of your PC, it is located under C:/program files/Maple .../ 3) Under Unix just put it where you put your maple programs usually, same on the macintosh. 4) in a maple session, type --> read inverter; 5) type tan(1.0); pilook(%); to test if your internet connection is working. 6) the program accepts real numbers OR any maple expression as long as it can be evaluated to a real floating point number, it is converted in the program BEFORE to be sent to the web site. -------------------------------------------------------------------------------- Simon Plouffe ps ; have fun!