@Inproceedings{EPTCS397.18, author = {Virgo, Nathaniel}, year = {2023}, title = {Unifilar Machines and the Adjoint Structure of Bayesian Filtering}, editor = {Staton, Sam and Vasilakopoulou, Christina}, booktitle = {{\rm Proceedings of the Sixth International Conference on} Applied Category Theory 2023, {\rm University of Maryland, 31 July - 4 August 2023}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {397}, publisher = {Open Publishing Association}, pages = {299-317}, doi = {10.4204/EPTCS.397.18}, }