Remembering Inverse, Converse, and Contrapositive of if-then Statements
If we have our statement p then q:
The inverse is inverting the signs think of i as the square root of -1. You are negating each element.
~p -> ~q
Converse, reverse.
q -> p.
Once you remember those, just remember that the contrapositive is converse and inverse combined.
~q -> ~p