A finite geometry is any geometric system that has only a finite number of points.
The familiar Euclidean geometry is not finite, because a Euclidean line contains infinitely many points. A geometry based on the graphics displayed on a computer screen, where the pixels are considered to be the points, would be a finite geometry. While there are many systems that could be called finite geometries, attention is mostly paid to the finite projective and affine spaces because of their regularity and simplicity. Other significant types of finite geometry are finite Möbius or inversive planes and Laguerre planes, which are examples of a general type called Benz planes, and their higher-dimensional analogs such as higher finite inversive geometries.
Finite geometries may be constructed via linear algebra, starting from vector spaces over a finite field; the affine and projective planes so constructed are called Galois geometries. Finite geometries can also be defined purely axiomatically. Most common finite geometries are Galois geometries, since any finite projective space of dimension three or greater is isomorphic to a projective space over a finite field (that is, the projectivization of a vector space over a finite field). However, dimension two has affine and projective planes that are not isomorphic to Galois geometries, namely the non-Desarguesian planes. Similar results hold for other kinds of finite geometries.
A finitegeometry is any geometric system that has only a finite number of points. The familiar Euclidean geometry is not finite, because a Euclidean line...
methods of discrete geometric objects. Most questions in discrete geometry involve finite or discrete sets of basic geometric objects, such as points, lines...
Finitegeometry is the study of geometric systems having only a finite number of points. Structures analogous to those found in continuous geometries...
In mathematics, affine geometry is what remains of Euclidean geometry when ignoring (mathematicians often say "forgetting") the metric notions of distance...
Combinatorial designs Finitegeometry Intersection theorem Levi graph As, for example, L. Storme does in his chapter on FiniteGeometry in Colbourn & Dinitz...
synthetic geometry. Another topic that developed from axiomatic studies of projective geometry is finitegeometry. The topic of projective geometry is itself...
important example is a finitegeometry. For instance, in a finite plane, X is the set of points and Y is the set of lines. In a finitegeometry of higher dimension...
concept of angle and distance, finitegeometry that omits continuity, and others. This enlargement of the scope of geometry led to a change of meaning of...
synthetic geometry. Another topic that developed from axiomatic studies of projective geometry is finitegeometry. The topic of projective geometry is itself...
study of schemes of finite type over the spectrum of the ring of integers. The classical objects of interest in arithmetic geometry are rational points:...
Galois geometries. Finitegeometries can also be defined purely axiomatically. Most common finitegeometries are Galois geometries, since any finite projective...
Riemannian geometry is the branch of differential geometry that studies Riemannian manifolds, defined as smooth manifolds with a Riemannian metric (an...
In finitegeometry, the Fano plane (after Gino Fano) is a finite projective plane with the smallest possible number of points and lines: 7 points and...
Galois geometry (so named after the 19th-century French mathematician Évariste Galois) is the branch of finitegeometry that is concerned with algebraic...
to both its local and global geometry. Local geometry is defined primarily by its curvature, while the global geometry is characterised by its topology...
Combinatorics of FiniteGeometries is an undergraduate mathematics textbook on finitegeometry by Lynn Batten. It was published by Cambridge University...
different and algebraic geometry includes also geometry in finite characteristic. Algebraic geometry now finds applications in statistics, control theory...
3-manifolds with finite fundamental group. Examples include the 3-sphere, the Poincaré homology sphere, Lens spaces. This geometry can be modeled as...
quadrilaterals. Retrieved 21 October 2020. Dembowski, Peter (1968), Finitegeometries, Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 44, Berlin...
Foundations of geometry is the study of geometries as axiomatic systems. There are several sets of axioms which give rise to Euclidean geometry or to non-Euclidean...
can be finite or infinite. The term finite mathematics is sometimes applied to parts of the field of discrete mathematics that deals with finite sets,...
as well as over the real or complex numbers. Finitegeometry itself, the study of spaces with only finitely many points, found applications in coding theory...
called the Fano plane. See also the article on finitegeometry. Using the vector space construction with finite fields there exists a projective plane of order...
geometry is no more in use, except at elementary level, or for geometries that are not related to any sort of numbers, such as some finitegeometries...