Many people with fibromyalgia continue to work full or part time. But the chronic pain and fatigue associated with fibromyalgia often make working very difficult. If you are employed, it's important to learn about managing fibromyalgia symptoms and coping with pain and fatigue.
Definition of SET THEORY. : a branch of mathematics or of symbolic logic that deals with the nature and relations of sets.
Mathematical logic is often used in proof theory, set theory, model theory, and recursion theory. Proof theory is, quite logically, the study of formal proofs. Sets of propositions can be used to conclude new relationships. Set theory studies 'sets,' which are collections of objects.