polyhedral disk
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Circle packing theorem — Example of the circle packing theorem on K5, the complete graph on five vertices, minus one edge. The circle packing theorem (also known as the Koebe–Andreev–Thurston theorem) describes the possible tangency relations between circles in the plane … Wikipedia
Edge coloring — A 3 edge coloring of the Desargues graph. In graph theory, an edge coloring of a graph is an assignment of “colors” to the edges of the graph so that no two adjacent edges have the same color. For example, the figure to the right shows an edge… … Wikipedia
Möbius transformation — Not to be confused with Möbius transform or Möbius function. In geometry, a Möbius transformation of the plane is a rational function of the form of one complex variable z; here the coefficients a, b, c, d are complex numbers satisfying ad − … Wikipedia
List of Tron characters — This article covers notable characters of Tron franchise, including all of its various cinematic, literary, video game adaptations and sequels. Contents 1 Development 2 Tron 2.1 Bit 2.2 Lora Baines … Wikipedia
Tyros 2 — Yamaha Tyros2 is a digital arranger workstation keyboard produced by Yamaha Corporation in 2005. It was produced and designed by Kazuhisa Ueki and Soichiro Tanaka, respectively. Currently the flagship digital arranger workstation of Yamaha since… … Wikipedia
Euler characteristic — In mathematics, and more specifically in algebraic topology and polyhedral combinatorics, the Euler characteristic is a topological invariant, a number that describes one aspect of a topological space s shape or structure. It is commonly denoted… … Wikipedia
Discrete geometry — A collection of circles and the corresponding unit disk graph Combinatorial geometry redirects here. The term combinatorial geometry is also used in the theory of matroids to refer to a simple matroid, especially in older texts. Discrete geometry … Wikipedia
List of mathematics articles (P) — NOTOC P P = NP problem P adic analysis P adic number P adic order P compact group P group P² irreducible P Laplacian P matrix P rep P value P vector P y method Pacific Journal of Mathematics Package merge algorithm Packed storage matrix Packing… … Wikipedia
integument — /in teg yeuh meuhnt/, n. 1. a natural covering, as a skin, shell, or rind. 2. any covering, coating, enclosure, etc. [1605 15; < L integumentum a covering. See IN 2, TEGUMENT] Syn. 1. cortex, involucre, involucrum. * * * Covering of the body,… … Universalium
Order-7 triangular tiling — Poincaré disk model of the hyperbolic plane Type Regular hyperbolic tiling Vertex figure 37 Schläfli symbol(s) … Wikipedia
Planar graph — Example graphs Planar Nonplanar Butterfly graph K5 The complete graph K4 … Wikipedia
