Parallelepiped
111Gramian matrix — In linear algebra, the Gramian matrix (or Gram matrix or Gramian) of a set of vectors v 1,dots, v n in an inner product space is the symmetric matrix of inner products, whose entries are given by G {ij}=(v i|v j).An important application is to… …
112Primitive cell — In geometry, solid state physics and mineralogy, particularly in describing crystal structure, a primitive cell, is a minimum cell corresponding to a single lattice point of a structure with translational symmetry in 2D, 3D, or other dimensions.… …
113Biaxial nematic — A biaxial nematic is a spatially homogeneous liquid crystal with three distinct optical axes. This is to be contrasted to a simple nematic, which has a single preferred axis, around which the system is rotationally symmetric. The symmetry group… …
114Euler brick — In mathematics, an Euler brick, named after the famous mathematician Leonhard Euler, is a cuboid with integer edges and also integer face diagonals. A primitive Euler brick is an Euler brick with its edges relatively prime.Alternatively stated,… …
115Shear modulus — SI symbol: G SI unit: gigapascal Derivations from other quantities: G = τ / γ …
116List 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… …
117William Nicol — (1770 1851) was a Scottish physicist and geologist who invented the first device for obtaining plane polarized light the Nicol prism in 1828. He was born in 1770 in Humbie (East Lothian), not 1768 as previously thoughtFact|date=February… …
118Dynamical billiards — The Bunimovich stadium is a chaotic dynamical billiard A billiard is a dynamical system in which a particle alternates between motion in a straight line and specular reflections from a boundary. When the particle hits the boundary it reflects… …
119Jorkyball — is a modified form of 2 on 2 soccer taking influence from squash. It is played in a 10m x 5m cage on artificial turf with the possibility of using the walls to place the ball.History2 on 2 Jorkyball was invented by Gilles Paniez ( French ) in… …
120Rhombohedron — In geometry, a rhombohedron is a three dimensional figure like a cube, except that its faces are not squares but rhombi. It is a special case of a parallelepiped where all edges are the same length.In general the rhombohedron can have three types …
