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Geometric Hyperplanes of Lie Incidence Geometries
Geometriae Dedicata, 1997Let \(\Gamma=({\mathcal P},{\mathcal L})\) be a geometry of points and lines. A subspace of \(\Gamma\) is a set of points which contains every line that meets it in at least two points. An embedding \(\mu\) of \(\Gamma\) in a finite-dimensional vector space \(V\) consists of a map \(\mu_1\) of \({\mathcal P}\) into the set of 1-subspaces of \(V\) and a
Cooperstein, Bruce N., Shult, Ernest E.
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On the foundations of incidence geometry
Geometriae Dedicata, 1988Diagram geometries and chamber systems of various types have been used and investigated intensively in recent years - not only in finite group theory, but in other areas as well. This development has led to a need for some clarification of the variations and generalizations introduced by the many authors, and for a discussion of the different axiomatic
Buekenhout, Francis, Buset, Dominique
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1981
In this section we shall define the notions of an abstract geometry and an incidence geometry. These are given by listing a set of axioms that must be satisfied. After the definitions are made, we will give a number of examples which will serve as models for these geometries.
Richard S. Millman, George D. Parker
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In this section we shall define the notions of an abstract geometry and an incidence geometry. These are given by listing a set of axioms that must be satisfied. After the definitions are made, we will give a number of examples which will serve as models for these geometries.
Richard S. Millman, George D. Parker
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Modal logics for incidence geometries
Journal of Logic and Computation, 1997Let \(S=(P,L,\text{in})\) be an incidence plane by the well-known axioms: \(P,L\neq\emptyset\); \(\text{in}\subseteq P\times L\); \(P\cap L=\emptyset\); two points are together incident with one and only one line; each line contains at least two different points; each point belongs at least to two different lines.
Balbiani, Philippe +3 more
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On the Incidence Geometry of Grassmann Spaces
Geometriae Dedicata, 1999The main result is a characterization of the Grassmann space \({\mathbf G}\) of a projective space \(\mathcal P\). By definition, the point set \(P\) of \({\mathbf G}\) is the set of lines of \(\mathcal P\), the line set \(\mathcal L\) of \({\mathbf G}\) consists of all plane line pencils in \(\mathcal P\).
FERRARA DENTICE, Eva, MELONE N.
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Two incidence propositions in chain geometries
Monatshefte für Mathematik, 2011In the first half of the paper, the authors deal with Jordan systems of an associative \(F\)-algebra \(A\) with \(1\); \(F\) is a field and \(A^{*}\) denotes the group of units of \(A\). An element \(a\in A\) is called \textit{quadratic}, if there exists an \(\bar a\in A\) with \(a+{\bar a}\in F\) and \(a\cdot{\bar a}\in F\); \(a\cdot{\bar a}=:N(a ...
Özcan, Münevver, Herzer, Armin
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