hairy torus

См. также в других словарях:

• Hairy ball theorem — The hairy ball theorem of algebraic topology states that there is no nonvanishing continuous tangent vector field on the sphere. If f is a continuous function that assigns a vector in R3 to every point p on a sphere such that f ( p ) is always… …   Wikipedia

• Carpinus caroliniana — American Hornbeam foliage Scientific classification Kingdom: Plantae …   Wikipedia

• List of cutaneous conditions — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. See also: Cutaneous conditions, Category:Cutaneous conditions, and ICD 10… …   Wikipedia

• List of QI episodes (B series) — infobox tvseason season name = QI Series B caption = The front cover of the QI series B DVD, featuring Stephen Fry (left) and Alan Davies (right). dvd release date = 17 March, 2008 country = UK network = BBC first aired = 8 October, 2004 last… …   Wikipedia

• Topology — (Greek topos , place, and logos , study ) is the branch of mathematics that studies the properties of a space that are preserved under continuous deformations. Topology grew out of geometry, but unlike geometry, topology is not concerned with… …   Wikipedia

• mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… …   Universalium

• Fiber bundle — In mathematics, in particular in topology, a fiber bundle (or fibre bundle) is a space which looks locally like a product space. It may have a different global topological structure in that the space as a whole may not be homeomorphic to a… …   Wikipedia

• Parallelizable manifold — In mathematics, a parallelizable manifold M is a smooth manifold of dimension n having vector fields: V 1, ..., V n , such that at any point P of M the tangent vectors: V i , P provide a basis of the tangent space at P . Equivalently, the tangent …   Wikipedia

• Satz vom gekämmten Igel — In der Mathematik ist der Satz vom Igel (auch als Satz vom gekämmten Igel bekannt, im Englischen hairy ball theorem) eine Aussage über Vektorfelder auf differenzierbaren Mannigfaltigkeiten, die 1912 von Luitzen Egbertus Jan Brouwer bewiesen wurde …   Deutsch Wikipedia

• Human Race —     Human Race     † Catholic Encyclopedia ► Human Race     Mankind exhibits differences which have been variously interpreted. Some consider them so great that they regard the varieties of the human race as distinct species; others maintain the… …   Catholic encyclopedia

• Lemme de Milnor — Théorème de la boule chevelue Si un champ de vecteurs sur une sphère est symbolisé par des cheveux de longueur constante, le théorème de la boule chevelue stipule que la sphère contient au moins un épi. La figure en contient deux, un sur chaque… …   Wikipédia en Français