Something to think about: a pre-flopimplied odds situation
When holding a pocket pair, your odds to catch a set (or better) on the flop are 7.51:1 (Doyle Brunson's Super System: table XXV). If the pot is already 7.5x the current bet, implied oddsdon't play; you're priced in to call. If the pot is smaller than 8x, use implied odds (call it 8x to make it easier, and we err on the side of caution in our implied odds calculation):
8 * {bet} - pot = Z
The smaller of the 2 values (our stack) and (amount of villain's stack we can win if we catch a big hand) is Y
We want Z to be bigger than Y.
We want Z smaller than Y. We want to be able to get more than we need for 0EV.