especially in the group theoretic area of algebra, the projective linear group (also known as the projective general linear group or PGL) is the induced...
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is that the associated projective semilinear group PΓL(n, F) (which contains PGL(n, F)) is the collineation group of projective space, for n > 2, and thus...
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mathematics, a projective representation of a group G on a vector space V over a field F is a group homomorphism from G to the projective linear group P G L (...
25 KB (4,247 words) - 16:51, 8 April 2025
SL(2, R) SL(2, C) Modular group (PSL(2, Z)) Projective linear group Conformal map Representations of classical Lie groups Hall 2015 Section 2.5 Hall...
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a field, a linear fractional transformation is the restriction to the field of a projective transformation or homography of the projective line. When...
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one-dimensional linear subspaces of a two-dimensional vector space over the reals. The automorphisms of a real projective line are called projective transformations...
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the complex projective plane, and finite, such as the Fano plane. A projective plane is a 2-dimensional projective space. Not all projective planes can...
53 KB (6,933 words) - 21:56, 26 April 2025
In projective geometry and linear algebra, the projective orthogonal group PO is the induced action of the orthogonal group of a quadratic space V = (V...
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Cross-ratio (redirect from Projective invariant)
k-tuples of points are not in general position. While the projective linear group of the projective line is 3-transitive (any three distinct points can be...
30 KB (4,844 words) - 08:46, 28 April 2025
the field extension. The automorphism group of the projective n-space over a field k is the projective linear group PGL n ( k ) . {\displaystyle \operatorname...
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that the projective groups associated to these groups are also linear, though less obviously. For example, the group PSL2(R) is not a group of 2 × 2 matrices...
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Jordan's theorem that the projective special linear group PSL(2, q) is simple for q ≠ 2, 3. This theorem generalizes to projective groups of higher dimensions...
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Homography (redirect from Projective linear transformation)
In projective geometry, a homography is an isomorphism of projective spaces, induced by an isomorphism of the vector spaces from which the projective spaces...
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Projective space Projective transformation Projective geometry Projective linear group Quadric and conic section Glossary of linear algebra Glossary of...
5 KB (377 words) - 12:12, 30 October 2023
concept of a projective space originated from the visual effect of perspective, where parallel lines seem to meet at infinity. A projective space may thus...
37 KB (5,670 words) - 20:15, 2 March 2025
In mathematics, projective geometry is the study of geometric properties that are invariant with respect to projective transformations. This means that...
38 KB (5,099 words) - 13:20, 23 January 2025
mathematics, projective group may refer to: Projective linear group or one of the related linear groups Projective orthogonal group Projective unitary group Projective...
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orthogonal groups, general linear groups, projective groups, Euclidean groups, etc. Many matrix groups are also algebraic. Other algebraic groups occur naturally...
16 KB (2,244 words) - 11:33, 24 September 2024
the action of the general linear group on projective space. Particularly notable is PGL(2, K), the symmetries of the projective line, which is sharply 3-transitive...
46 KB (5,678 words) - 08:36, 2 May 2025
In mathematics, a linear algebraic group is a subgroup of the group of invertible n × n {\displaystyle n\times n} matrices (under matrix multiplication)...
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Semilinear map (redirect from Projective semilinear group)
In linear algebra, particularly projective geometry, a semilinear map between vector spaces V and W over a field K is a function that is a linear map "up...
12 KB (2,060 words) - 09:10, 7 November 2024
Möbius transformation (redirect from Möbius group)
are the projective transformations of the complex projective line. They form a group called the Möbius group, which is the projective linear group PGL(2...
70 KB (10,603 words) - 05:07, 10 April 2025
interpretation of the Brauer group of a field K is that it classifies the projective varieties over K that become isomorphic to projective space over an algebraic...
22 KB (2,937 words) - 18:11, 30 April 2025
holomorphic isometry group of complex projective space, just as the projective orthogonal group is the isometry group of real projective space. In terms of...
13 KB (2,310 words) - 12:41, 21 September 2023
SL2(R) (category Projective geometry)
by fractional linear transformations. The group action factors through the quotient PSL(2, R) (the 2 × 2 projective special linear group over R). More...
21 KB (2,988 words) - 18:22, 23 July 2024
variety Projective linear group Projective module Projective line Projective object Projective transformation Projective hierarchy Projective connection...
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are conjugate. The projective linear group of dimension two over the finite field with five elements, PGL(2, 5), acts on the projective line over the field...
22 KB (3,213 words) - 17:25, 20 December 2024
Severi–Brauer variety (category Algebraic groups)
Galois cohomology classes in H1(G(Ks/K),PGLn), where PGLn is the projective linear group, and n is one more than the dimension of the variety V. As usual...
6 KB (717 words) - 15:49, 21 February 2024
In mathematics, the modular group is the projective special linear group PSL ( 2 , Z ) {\displaystyle \operatorname {PSL} (2,\mathbb {Z} )} of 2 × 2...
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11 in humans for the group P G L 2 {\displaystyle \mathrm {PGL} _{2}} in mathematics, see projective linear group and modular group This disambiguation...
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