@InProceedings{nash:LIPIcs.ITP.2023.23, author = {Nash, Oliver}, title = {{A Formalisation of Gallagher’s Ergodic Theorem}}, booktitle = {14th International Conference on Interactive Theorem Proving (ITP 2023)}, pages = {23:1--23:16}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-284-6}, ISSN = {1868-8969}, year = {2023}, volume = {268}, editor = {Naumowicz, Adam and Thiemann, Ren\'{e}}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ITP.2023.23}, URN = {urn:nbn:de:0030-drops-183981}, doi = {10.4230/LIPIcs.ITP.2023.23}, annote = {Keywords: Lean proof assistant, measure theory, metric number theory, ergodicity, Gallagher’s theorem, Duffin-Schaeffer conjecture} }