%0 Journal Article %A John C. Baez %A Kenny Courser %T Coarse-graining open Markov processes %J Theory and applications of categories %D 2018 %P 1223-1268 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAC_2018_33_a38/ %G en %F TAC_2018_33_a38