Fixed-point subring
id:
fixed-point-subring-235-4810593
title:
Fixed-point subring
text:
In algebra, the fixed-point subring R f of an automorphism f of a ring R is the subring of the fixed points of f, that is, More generally, if G is a group acting on R, then the subring of R is called the fixed subring or, more traditionally, the ring of invariants under G. If S is a set of automorphisms of R, the elements of R that are fixed by the elements of S form the ring of invariants under the group generated by S. In particular, the fixed-point subring of an automorphism f is the ring of
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wiki
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encyclopedia
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original url:
https://en.wikipedia.org/wiki/Fixed-point_subring
date created:
date modified:
2022-05-31T11:01:32Z
main entity:
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13
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