@InProceedings{larcheywendling:LIPIcs.FSCD.2021.18, author = {Larchey-Wendling, Dominique}, title = {{Synthetic Undecidability of MSELL via FRACTRAN Mechanised in Coq}}, booktitle = {6th International Conference on Formal Structures for Computation and Deduction (FSCD 2021)}, pages = {18:1--18:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-191-7}, ISSN = {1868-8969}, year = {2021}, volume = {195}, editor = {Kobayashi, Naoki}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FSCD.2021.18}, URN = {urn:nbn:de:0030-drops-142568}, doi = {10.4230/LIPIcs.FSCD.2021.18}, annote = {Keywords: Undecidability, computability theory, many-one reduction, Minsky machines, Fractran, sub-exponential linear logic, Coq} }