jerzy.karczmarczuk@info.unicaen.fr wrote:
When math says that something is undefined, in my little brain I understand that there is no answer. NO answer.
Math doesn't say that something is undefined, but tells you that you did something that's illegal, i.e. impossible, in the system you're working with. Trying to divide by zero is like trying to break out of a mental asylum with a banana: It's neither a good tool to fight your way free, as well as using it will get you back into the asylum, by system-inherent laws. The mathematically right, and only really sane way to handle such things is not to do them at all, which would change Haskell's semantics rather drastically. There just is no unsafePerformMath :: Math a -> a. -- (c) this sig last receiving data processing entity. Inspect headers for past copyright information. All rights reserved. Unauthorised copying, hiring, renting, public performance and/or broadcasting of this signature prohibited.