Question

Here’s a question for those who know discrete math or proofs. In one of my classes, “if and only if” is <=>. In another, “if and only if” is <->, and instead, “logically equivalent” is <=>.

So my question is, in the long run, which symbol is better to use for “if and only if”?

Answer 1

In the long run, it is better to use the <=> symbol for "if and only if." This is because the <=> symbol is more universally recognized and easier to remember. Additionally, the <=> symbol is more often used in mathematical proofs, so it is more likely to be understood by those who know discrete math or proofs.

Hope this helps :)