- dilations
- di'la·tion || -eɪʃn n. broadening, widening; expansion
English contemporary dictionary. 2014.
dilations
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Mathematical morphology — A shape (in blue) and its morphological dilation (in green) and erosion (in yellow) by a diamond shape structuring element. Mathematical morphology (MM) is a theory and technique for the analysis and processing of geometrical structures, based on … Wikipedia
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Inversive geometry — Not to be confused with Inversive ring geometry. In geometry, inversive geometry is the study of those properties of figures that are preserved by a generalization of a type of transformation of the Euclidean plane, called inversion. These… … Wikipedia
Ambient construction — In conformal geometry, the ambient construction refers to a construction of Charles Fefferman and Robin Graham [Fefferman, C. and Graham, R. Conformal invariants , in Élie Cartan et les Mathématiques d Aujourdui , Asterisque (1985), 95 116.] for… … Wikipedia
Sz.-Nagy's dilation theorem — The Sz. Nagy dilation theorem (proved by Béla Szőkefalvi Nagy) states that every contraction T on a Hilbert space H has a unitary dilation U to a Hilbert space K , containing H , with:T^n = P H U^n vert HMoreover, such a dilation is unique (up to … Wikipedia
heteropteran — ▪ insect order Introduction any member of the insect order Heteroptera, which comprises the so called true bugs. (Some authorities use the name Hemiptera; others consider both the heteropterans and the homopterans to be suborders of the… … Universalium
Ampulla — Am*pul la, n.; pl. {Ampull[ae]}. [L. ] 1. (Rom. Antiq.) A narrow necked vessel having two handles and bellying out like a jug. [1913 Webster] 2. (Eccl.) (a) A cruet for the wine and water at Mass. (b) The vase in which the holy oil for chrism,… … The Collaborative International Dictionary of English
Ampullae — Ampulla Am*pul la, n.; pl. {Ampull[ae]}. [L. ] 1. (Rom. Antiq.) A narrow necked vessel having two handles and bellying out like a jug. [1913 Webster] 2. (Eccl.) (a) A cruet for the wine and water at Mass. (b) The vase in which the holy oil for… … The Collaborative International Dictionary of English
Spinor — In mathematics and physics, in particular in the theory of the orthogonal groups (such as the rotation or the Lorentz groups), spinors are elements of a complex vector space introduced to expand the notion of spatial vector. Unlike tensors, the… … Wikipedia
