If And Only If

What is If And Only If?

A term used by mathematicians and logicians to indicate that something happens under very specific conditions. Often seen in proofs and theories.

1) The sum a geometric sequence is given by a/(1-r) if and only if |r| < 1.

2) In a bar:

dumped guy: "My girlfriend left me because I told her I loved her!"

other guy: "What a bitch!"

dumped guy: "No, it's all my fault, she's a mathematician, and I should have said 'I love you and only you'".

D'morrow

1. Lazy pronounciation of the word, "tomorrow". "Yeaaa...I'll be baaack d'morrow." See tomorrow, later, laz..

Yfl

1. You Fail Life Since you really don't want to waste any more of your time on people who fail at life than necessary, YFL is there t..

<^^< T >^^>

1. An alternate to the kirby dance in the IM forums. used to represent a less happy and more F*ck YEAH! approach to the topic. Dude1: you ..

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If And Only If Edit Meaning