C. C. Chang

C.C. Chang was a prominent logician known for his contributions to model theory, a branch of mathematical logic that studies the relationships between formal languages and their interpretations, or models. He is best known for the Chang's Conjecture, which pertains to the structure of certain mathematical systems called "partially ordered sets." His work explored the connections between model theory and set theory, particularly issues of size and cardinality. Chang's insights have advanced our understanding of how different mathematical models can represent the same abstract concepts, enriching both logic and mathematics as a whole.