Formalization of countable multisets (in Isabelle/HOL). ~ Mathias Schack Rabing, Dmitriy Traytel. https://isa-afp.org/entries/Countable_Multiset.html #IsabelleHOL #ITP
Formalization of Countable Multisets

Formalization of Countable Multisets in the Archive of Formal Proofs