i dont think very many ppl will know the answer to this, but its late at night and i thought it would be fun to ask anyways. i just bought a text on fuzzy set theory and logic and im waiting for it to arrive. but im really curious, what mathematics are done on fuzzy sets? whats the algebraic structure, or the topological structure on fuzzy sets? can you define a fuzzy norm so that it resembles a banach space enabling you to do calculus? is there a meaningful way to define measures? the thing is that all of axiomatic set theory (and hence all of classical mathematics) depends on the implicit undefined notion of sets and set membership, so disposing of this, i cant think of how to proceed to define meaningful concepts of 'topology' or 'algebra' on fuzzy sets. anyways, if you have no idea what im talking about, why dont you just tell me what the meaning of life is?