Max Dehn, Axel Thue, and the Undecidable
arXiv:1703.09750
Abstract
This is a short essay on the roles of Max Dehn and Axel Thue in the formulation of the word problem for (semi)groups, and the story of the proofs showing that the word problem is undecidable.
arXiv commentfinal version to appear in Dehn volume