Ab2ab2 26.4k1313 gold badges7272 silver badges105105 bronze badges 10 And from the 60s, in my Latin class we chanted the associated Ubi, ubi est meus sub ubi? bib is often a commutative monoid with id element 0. It's a cost-free monoid on one generator. This commutative monoid satisfies the cancellation https://safeherbalsupplements.tech.blog/