invariant element
11Kervaire invariant — In mathematics, the Kervaire invariant, named for Michel Kervaire, is defined in geometric topology. It is an invariant of 4 n + 2 dimensional almost parallelizable smooth manifolds M , taking values in the 2 element group :Z/2Z. It is equal to… …
12Arf invariant (knot) — In the mathematical field of knot theory, the Arf invariant of a knot, named after Cahit Arf, is a knot invariant obtained from a quadratic form associated to a Seifert surface. If F is a Seifert surface of a knot, then the homology group H1( F …
13Coxeter element — Not to be confused with Longest element of a Coxeter group. In mathematics, the Coxeter number h is the order of a Coxeter element of an irreducible Coxeter group, hence also of a root system or its Weyl group. It is named after H.S.M.… …
14J-invariant — nome q on the unit diskIn mathematics, Klein s j invariant, regarded as a function of a complex variable tau;, is a modular function defined on the upper half plane of complex numbers. We can express it in terms of Jacobi s theta functions, in… …
15De Rham invariant — In geometric topology, the de Rham invariant is a mod 2 invariant of a (4k+1) dimensional manifold, that is, an element of – either 0 or 1. It can be thought of as the simply connected symmetric L group L4k + 1, and thus analogous to the other… …
16Seiberg–Witten invariant — In mathematics, Seiberg–Witten invariants are invariants of compact smooth 4 manifolds introduced by harvtxt|Witten|1994, using the Seiberg Witten theory studied by harvs|txt=yes|last=Seiberg|last2=Witten|year1=1994a|year2=1994b during their… …
17Modular invariant of a group — In mathematics, a modular invariant of a group is an invariant of a finite group acting on a vector space of positive characteristic (usually dividing the order of the group). The study of modular invariants was originated in about 1914 by… …
18Electrical element — Electrical elements are conceptual abstractions representing idealized electrical components, such as resistors, capacitors, and inductors, used in the analysis of electrical networks. Any electrical network can be analysed as multiple,… …
19Dickson invariant — In mathematics, the Dickson invariant, named after Leonard Eugene Dickson, may mean: The Dickson invariant of an element of the orthogonal group in characteristic 2 A modular invariant of a group studied by Dickson This disambiguation page lists… …
20Wingless localisation element 3 (WLE3) — The WL3 Wingless localisation element 3 (WLE3) is is an RNA structure that localises the wingless mRNA in flies. The structure consists of a stem, a bulge region, another stem and a loop.The published structure was determined and refined through… …
