Let f be a one-to-one correspondence of the points in a plane. Prove or disprove the following statement:

"If f maps circles to circles, then it maps straight lines to straight lines."

(In reply to re: Full Proof by Bractals)

I understand the error in reasoning you are trying to point out, but I do not see where I made such an error in my proof.  Could you point out where, specifically?

Posted by Tristan on 2006-12-17 00:20:28