The module sage.rings.number_field.morphism contains classes for homsets as well as homomorphisms. It would be good to split off the homsets as a new module similar to sage.rings.homset. One advantage is that this will make the patch for #28869 more readable.

Component: number fields

Author: Peter Bruin

Branch/Commit: fa2a465

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/29010