f Math 58 (1936): 345-63. ———. “Systems of Logic Based on Ordinals.” Proceedings of the London Mathematical Society 2, no. 1 (1939): 161-228. ———. “The Chemical Basis of Morphogenesis.” Bulletin of Mathematical Biology 52, no. 1 (1990): 153-97. Chapter 11 Baxa, Christoph. “A Note on Diophantine Representations.” American Mathemat