Hi Haskell,
Well, there are several mathematical problems proved to be impossible, such as squaring the circle, doubling the cube and trisecting an angle. These are all very Google-able if you need more details.
Probably more what you're after, if I understand your question, is Turing's Halting Problem, which goes to the heart of such questions. Again, very Google-able.
Hope this helps.
Tim
From: H A S K E L L <haskellboy@...>
To: UnsolvedProblems@yahoogroups.com
Sent: Tuesday, November 18, 2008 11:22:18 AM
Subject: [UnsolvedProblems] Problems that are proven to have no solution
Hi there,
I am trying to find a problem that has been proven to have no solution
and I need some help. I know that is the class of problems called to
be undecidable but that only implies that this problem has a yes or no
question. Is there anything like an insolubility class ? that implies
that the question has no answer regard the answer, not that it is
still to be solved but was proven that cannot be solved ?