113 1685-1750 1811-1832 1898-1972 500 509 530 ai ancient art artandscience artificialintelligence bach beauty calligraphy chaoticbehaviorinsystems cognition colors congresses consciousness controversialliterature creativeability creativity diophantineanalysis escher evariste formal-systems galois galoistheory grouptheory gödel history intelligence johannsebastian kurt logic mathematics meaning metamathematics music nature(aesthetics) necessity(philosophy) paradox patternformation(biology) philosophy philosophyandscience philosophyofnature planning playsonwords popularworks protagoras recursion relativity science self-reference sophists(greekphilosophy) symbolism symmetricfunctions symmetry(art) symmetry(physics) systems-theory u4a visualperception wordsinart zen