I feel that my ideas in philosophy require a mathematical treatment. Unfortunately, I'm not well prepared and am finding it rather difficult to "think like a mathematician". I've had calculus and a first course in differntial equations but that was twenty years ago. I'm hoping to get help moving past blocks to understanding classical set theory, alternative set theory, and graph theory. I'm not sure where else my ideas will lead me, but those are more than enough for now. Thanks.