# necessary and sufficient

## Primary tabs

Defines:
necessary, necessity, sufficient, sufficiency
Major Section:
Reference
Type of Math Object:
Definition
Parent:

## Mathematics Subject Classification

I added this entry because the words necessary'' and sufficient'' seem to always confuse me. I would not be surprised if I still have it confused and that this entry is incorrect. :-) Anyways, I wanted to put this entry here so that I have an easy reference as to which means which instead of trying to keep it straight in my head and constantly mixing it up.