different between subgroup vs nilmanifold
subgroup
English
Etymology
sub- +? group.
Pronunciation
IPA(key): /?s?b???u?p/
Noun
subgroup (plural subgroups)
- A group within a larger group; a group whose members are some, but not all, of the members of a larger group.
- 1998, Robert A. Johnson, Prevalence of Substance Use Among Racial and Ethnic Subgroups in the United States, 1991-1993, Department of Health and Human Services, page B-11,
- Based on U.S. Bureau of the Census (1992c), other metropolitan areas that might be suitable for oversampling specific racial/ethnic subgroups include Miami (18% Cuban), New York City (7% Puerto Rican), Los Angeles (26% Mexican), and Honolulu (23% Japanese). Three techniques might be used to increase the yield of rare subgroup members within metropolitan areas where they are concentrated: 1) oversampling of areal segments containing high percentages of the subgroup, […] .
- 1998, Robert A. Johnson, Prevalence of Substance Use Among Racial and Ethnic Subgroups in the United States, 1991-1993, Department of Health and Human Services, page B-11,
- (group theory) A subset H of a group G that is itself a group and has the same binary operation as G.
- 1990, Peter B. Kleidman, Martin W. Liebeck, The Subgroup Structure of the Finite Classical Groups, Cambridge University Press, page 1,
- Much of the information about a group can be gleaned from a study of its subgroups. For these reasons it is important to study the subgroup structure of the almost simple groups, and in particular their maximal subgroups.
- 1991, Gregori A. Margulis, Discrete Subgroups of Semisimple Lie Groups, Springer-Verlag, page 13,
- A subgroup H of an algebraic group G is called algebraic if H is an algebraic subvariety of G. Algebraic subgroups defined over k (as algebraic subvarieties) are called k-subgroups. An algebraic subgroup of an algebraic group is called k-closed or closed over k (resp. k-defined or defined over k) if it is k-closed (resp. k-defined) as an algebraic subvariety.
- 2012, Yorck Sommerhäuser, Yongchang Zhu, Hopf Algebras and Congruence Subgroups, American Mathematical Society, page 3,
- This is applied in Chapter 9 to prove the first congruence subgroup theorem, which asserts that g.z = z for all z in the center of the Drinfel'd double D(H) and all g in the principal congruence subgroup.
- 1990, Peter B. Kleidman, Martin W. Liebeck, The Subgroup Structure of the Finite Classical Groups, Cambridge University Press, page 1,
Synonyms
- (group within a group): subset
Derived terms
Translations
Verb
subgroup (third-person singular simple present subgroups, present participle subgrouping, simple past and past participle subgrouped)
- To divide or classify into subgroups
subgroup From the web:
- what subgroup is raw spinach in
- what subgroup is winter squash in
- what subgroup of humans is most impacted
- what subgroup do potatoes belong to
- what subgroup is green peppers in
- what subgroups of covalent molecules are there
- what subgroup is the lowest
- what subgroup are carrots in
nilmanifold
English
Etymology
nil +? manifold, after nilpotent
Noun
nilmanifold (plural nilmanifolds)
- (mathematics) A quotient space of a nilpotent Lie group modulo a closed subgroup, or (equivalently) a homogeneous space with a nilpotent Lie group acting transitively on it.
nilmanifold From the web:
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