baseRings -- store the list of base rings of a ring

baseRings -- store the list of base rings of a ring

baseRings -- a symbol used as a key in a ring R under which is stored a list of base rings for R.

A base ring A of R is one of the rings involved in the construction of R. The natural ring homomorphism from A to R is implemented with promote.

The base rings are presented in chronological order.