Re: [Haskell-cafe] smallest double eps

Hang on, hang on, now I'm getting confused.

First you asked for the smallest (positive) x such that 1+x /= x which is around x=4.5e15. Then Joachim wondered if you wanted 1+x /= 1 which is around x=2.2e-16. But not you claim to be looking for the smallest positive number that a Double can represent. Which is a totally different beast. The smallest possible Double depends on if you want to accept denormalized numbers or not. If you don't, then it's about x=4.5e-308.

Now what is the number you are looking for?

-- Lennart

This is the point I was confused about also. Joachim seemed to be correcting what might have been a misstatement of the problem.