Degree => ..., default value null, specify the degree of a map
DegreeLift => ..., default value null, make a ring map
DegreeMap => ..., default value null, make a ring map
Outputs:
a map to Y from X defined by data d.
Description
The function map provides a general mechanism for constructing a map (homomorphism) between rings (a ring map), modules (a matrix), or between objects in other categories.
See also the function matrix, which focuses on creating new matrices from rectangular arrays of ring elements or matrices.