As a noun subring
is (algebra) a ring which is contained in a larger ring, such that the multiplication and addition on the former are a restriction of those on the latter.
As a verb sabring is
.
subring
English
Noun
(
en noun)
(algebra) a ring which is contained in a larger ring, such that the multiplication and addition on the former are a restriction of those on the latter
Usage notes
If the larger ring contains a multiplicative identity, certain authors also require that the identity also be contained in the subring.