abstract vertex
71Dilworth's theorem — In mathematics, in the areas of order theory and combinatorics, Dilworth s theorem characterizes the width of any finite partially ordered set in terms of a partition of the order into a minimum number of chains. It is named for the mathematician …
72Line graph of a hypergraph — The line graph of a hypergraph is the graph whose vertex set is the set of the hyperedges of the hypergraph, with two edges adjacent when they have nonempty intersection. In other words, the line graph of a hypergraph is the intersection graph of …
73MHV Amplitudes — In theoretical particle physics, maximally helicity violating amplitudes are amplitudes with n external gauge bosons, where n 2 gauge bosons have a particular helicity and the other two have the opposite helicity. These amplitudes are called MHV… …
74Butterfly (game) — Butterfly is a two player abstract strategy game from Mozambique. The game is related to draughts and Alquerque. It is the same game as Lau kata kati from India which may suggest a historical connection between the two games. Goal To capture all… …
75Icosahedral honeycomb — Poincaré disk model Type regular hyperbolic honeycomb Schläfli symbol {3,5,3} Coxeter Dynkin diagram …
76RGB color model — RGB redirects here. For other uses, see RGB (disambiguation). A representation of additive color mixing. Projection of primary color lights on a screen shows secondary colors where two overlap; the combination of all three of red, green, and blue …
77Moons of Saturn — Artist s concepts of the Saturnian ring–moon system Saturn, its rings and major icy moons from Mimas to Rhea …
78Regge calculus — In general relativity, Regge calculus is a formalism for producing simplicial approximations of spacetimes which are solutions to the Einstein field equation. The calculus was introduced by the Italian theoretician Tullio Regge in the early 1960s …
79Small cancellation theory — In the mathematical subject of group theory, small cancellation theory studies groups given by group presentations satisfying small cancellation conditions, that is where defining relations have small overlaps with each other. It turns out that… …
80Outline of algebraic structures — In universal algebra, a branch of pure mathematics, an algebraic structure is a variety or quasivariety. Abstract algebra is primarily the study of algebraic structures and their properties. Some axiomatic formal systems that are neither… …
