group surfaces

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• Group B — The Group B referred to a set of regulations introduced in 1982 for competition vehicles in sportscar racing and rally racing regulated by the FIA. The Group B regulations fostered some of the quickest, most powerful and sophisticated rally cars… …   Wikipedia

• Differential geometry of surfaces — Carl Friedrich Gauss in 1828 In mathematics, the differential geometry of surfaces deals with smooth surfaces with various additional structures, most often, a Riemannian metric. Surfaces have been extensively studied from various perspectives:… …   Wikipedia

• Mapping class group — In mathematics, in the sub field of geometric topology, the mapping class group is an important algebraic invariant of a topological space. Briefly, the mapping class group is a discrete group of symmetries of the space. Contents 1 Motivation 2… …   Wikipedia

• blood group — Med. any of various classes into which human blood can be divided according to immunological compatibility, based on the presence or absence of specific antigens on red blood cells. Also called blood type. Cf. ABO system, Rh factor. [1915 20] * * …   Universalium

• 56th Fighter Group — Infobox Military Unit unit name= 56th Fighter Group caption=P 47D 44 19770, 61st Fighter Squadron, 56th FG dates= December 16, 1941 October 18, 1945 country= United States of America allegiance= branch= United States Army Air Forces type= Fighter …   Wikipedia

• Outer automorphism group — In mathematics, the outer automorphism group of a group G is the quotient Aut(G) / Inn(G), where Aut(G) is the automorphism group of G and Inn(G) is the subgroup consisting of inner automorphisms. The outer automorphism group is usually …   Wikipedia

• (2,3,7) triangle group — In the theory of Riemann surfaces and hyperbolic geometry, the triangle group (2, 3, 7) is particularly important. This importance stems from its connection to Hurwitz surfaces, namely Riemann surfaces of genus g with the largest possible order,… …   Wikipedia

• Systoles of surfaces — In mathematics, systolic inequalities for curves on surfaces were first studied by Charles Loewner in 1949 (unpublished; see remark at end of Pu s paper in 52). Given a closed surface, its systole, denoted sys, is defined to the least length of a …   Wikipedia

• Modular group — For a group whose lattice of subgroups is modular see Iwasawa group. In mathematics, the modular group Γ is a fundamental object of study in number theory, geometry, algebra, and many other areas of advanced mathematics. The modular group can be… …   Wikipedia

• Geometric group theory — is an area in mathematics devoted to the study of finitely generated groups via exploring the connections between algebraic properties of such groups and topological and geometric properties of spaces on which these groups act (that is, when the… …   Wikipedia

• Teichmüller modular group — In mathematics, a Teichmüller modular group, or mapping class group of a surface, or homeotopy group of a surface, is the group of isotopy classes of orientation preserving homeomorphisms of an oriented surface. It is also a group of… …   Wikipedia