- subinvariant set
- мат.субинвариантное множество
English-Russian scientific dictionary. 2008.
English-Russian scientific dictionary. 2008.
Subgroup series — In mathematics, a subgroup series is a chain of subgroups: Subgroup series can simplify the study of a group to the study of simpler subgroups and their relations, and several subgroup series can be invariantly defined and are important… … Wikipedia