Revision as of 10:30, 7 July 2006 by JBL (talk | contribs)

Iff is an abbreviation for the phrase "if and only if."

In order to prove a statement of the form, "A iff B," it is necessary to prove two distinct implications: that A implies B ("if A then B") and that B implies A ("if B then A").

This article is a stub. Help us out by expanding it.

Invalid username
Login to AoPS