Jakob von Raumer. Formalizing Double Groupoids and Cross Modules in the Lean Theorem Prover. In Gert-Martin Greuel, Thorsten Koch, Peter Paule, Andrew J. Sommese, editors, Mathematical Software - ICMS 2016 - 5th International Conference, Berlin, Germany, July 11-14, 2016, Proceedings. Volume 9725 of Lecture Notes in Computer Science, pages 28-33, Springer, 2016. [doi]
Abstract is missing.