system of subgroups
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System of imprimitivity — The concept of system of imprimitivity is used in mathematics, particularly in algebra and analysis, both within the context of the theory of group representations. It was used by George Mackey as the basis for his theory of induced unitary… … Wikipedia
Lattice of subgroups — In mathematics, the lattice of subgroups of a group G is the lattice whose elements are the subgroups of G, with the partial order relation being set inclusion.In this lattice, the join of two subgroups is the subgroup generated by their union,… … Wikipedia
Canadian system of soil classification — The Canadian system of soil classification is more closely related to the American system than any other. They differ in several ways. The Canadian system is designed to cover only Canadian soils. The Canadian system dispenses with a sub order… … Wikipedia
ABO blood group system — ABO redirects here. For other uses, see ABO (disambiguation). H substance redirects here. For use in inflammation, see histamine. ABO blood group antigens present on red blood cells and IgM antibodies present in the serum The ABO blood group… … Wikipedia
Civil law (legal system) — For the article on the area of common law systems dealing with disputes between private parties, see Civil law (common law). Legal Systems of the World Civ … Wikipedia
Quinarian system — The Quinarian system was a method of zoological classification which had a brief period of popularity in the mid 19th century, especially among British naturalists. It was largely developed by the entomologist W. S. MacLeay in 1819. The system… … Wikipedia
List of subgroups of the order Coleoptera — This article classifies the subgroups of the order Coleoptera (beetles) down to the level of families, following the system in Volume 2 of American Beetles (2002) for all North American families (there were changes in the system between Vols. 1… … Wikipedia
Calcicolous grasslands in the British National Vegetation Classification system — This article gives an overview of the calcicolous grassland communities in the British National Vegetation Classification system.IntroductionThe calcicolous grassland communities of the NVC were described in Volume 3 of British Plant Communities … Wikipedia
Voting system — For other uses, see Voting system (disambiguation). Part of the Politics series Electoral methods … Wikipedia
Star system — This article is about stars in outer space. For the Hollywood star system, see Star system (film). For a system of planets around a star, see Planetary system. A star system or stellar system is a small number of stars which orbit each other,[1]… … Wikipedia
Adaptive immune system — The adaptive immune system is composed of highly specialized, systemic cells and processes that eliminate or prevent pathogenic challenges. Thought to have arisen in the first jawed vertebrates, the adaptive or specific immune system is activated … Wikipedia
