3 papers
quant-ph2026
Generalized Inverses of Quantum Channels: a categorical perspective
Robin Cockett, Jean-Simon Pacaud Lemay, Priyaa Varshinee Srinivasan
A quantum channel is defined as being completely positive (CP) and trace preserving (TP). While not every quantum channel is invertible or reversible, every quantum channel admits…
math.CT2025
Drazin Inverses in Categories
Robin Cockett, Jean-Simon Pacaud Lemay, Priyaa Varshinee Srinivasan
Drazin inverses are a fundamental algebraic structure which have been extensively deployed in semigroup theory, ring theory, and matrix theory. Drazin inverses can also be defined…
math.CT2025
Classical Distributive Restriction Categories
Robin Cockett, Jean-Simon Pacaud Lemay
In the category of sets and partial functions, , while the disjoint union is the usual categorical coproduct, the Cartesian product becomes a restri…