FL asked me to post this. -------- Forwarded Message -------- Subject: Nicod, Scheffer Whitehead and Russel Date: Wed, 29 Apr 2020 10:58:07 +0200 (CEST) From: fl To: Megill Norman
Hi Norm, can you post this: A complement about Nicod. His paper about his axiom is dated 1916, three years After Scheffer's work and he makes an explicit mention of Scheffer inside. So it is clear it is Scheffer's article that prompted Nicod to work on his axiom (the underlying Idea is the same: reducing the number of connectors) and I think it is Nicod's article that prompted Whitehead and Russel to mention the XOR operator in Principia Mathematica. Nicod was at Trinity college, he was French and he died at 30 of tuberculosis. -- FL -- You received this message because you are subscribed to the Google Groups "Metamath" group. To unsubscribe from this group and stop receiving emails from it, send an email to metamath+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/metamath/b6501955-a28c-460a-88af-98e85a56f2fd%40googlegroups.com.
