PLI 2000: Last Call for Workshops

2000-01-03 Thread Amy Felty
CALL FOR WORKSHOP PROPOSALS PRINCIPLES, LOGICS, AND IMPLEMENTATIONS OF HIGH-LEVEL PROGRAMMING LANGUAGES (PLI 2000) Montreal, Canada, September 18-23, 2000 http://www.cs.yorku.ca/pli-00 Submiss

Re: Inverse function (and ray tracing)

2000-01-03 Thread Brett_A . _Letner
>> I understood (apparently correctly) that Brett *knows* the inverse of >> functions he is interested in. Exactly. >> The problem is that in Haskell it is not possible to distinguish >> between functions, they do not belong to the Eq class Yes, I believe this is the heart of the problem. A

Re: Inverse function (and ray tracing)

2000-01-03 Thread Jerzy Karczmarczuk
Brett A. Letner precises his wishes concerning the inverse function. Somebody objected : > >> that is not possible in the general case. > >> Not to forget that even if it was, not all functions has inverses. I understood (apparently correctly) that Brett *knows* the inverse of functions he is i