isotropic hyperplane

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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
Critical dimension — For the minimum feature size in photolithography, see Photolithography. In the renormalization group analysis of phase transitions in physics, a critical dimension is the dimensionality of space at which the character of the phase transition… … Wikipedia
Cross product — This article is about the cross product of two vectors in three dimensional Euclidean space. For other uses, see Cross product (disambiguation). In mathematics, the cross product, vector product, or Gibbs vector product is a binary operation on… … Wikipedia
Relativity of simultaneity — thumb|Event B is simultaneous with A in the green reference frame, but it occurredbefore in the blue frame, and will occur later in the red frame.The relativity of simultaneity is the concept that simultaneity is not absolute, but dependent on… … Wikipedia
Hermitian variety — Hermitian varieties are in a sense a generalisation of quadrics, and occur naturally in the theory of polarities.DefinitionLet K be a field with an involutive automorphism heta. Let n be an integer geq 1 and V be an (n+1) dimensional vectorspace… … Wikipedia

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