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Displaying 221 – 240 of 298

On the geometry of symplectic involutions.

Pankov, Mark (2006)

Beiträge zur Algebra und Geometrie

On the graphs of Hoffman-Singleton and Higman-Sims.

Hafner, Paul R. (2004)

The Electronic Journal of Combinatorics [electronic only]

On the Group of Transformations of Constructible Euclidean Planes with Preserve a Single Distance.

Bijan Farrahi (1977)

Jahresbericht der Deutschen Mathematiker-Vereinigung

On the Haagerup inequality and groups acting on ${\tilde{A}}_{n}$ -buildings

Alain Valette (1997)

Annales de l'institut Fourier

Let $Γ$ be a group endowed with a length function $L$ , and let $E$ be a linear subspace of $C Γ$ . We say that $E$ satisfies the Haagerup inequality if there exists constants $C, s > 0$ such that, for any $f \in E$ , the convolutor norm of $f$ on $ℓ^{2} (Γ)$ is dominated by $C$ times the $ℓ^{2}$ norm of $f (1 + L)^{s}$ . We show that, for $E = C Γ$ , the Haagerup inequality can be expressed in terms of decay of random walks associated with finitely supported symmetric probability measures on $Γ$ . If $L$ is a word length function on a finitely generated group $Γ$ , we show that,...

On the history of generalized quadrangles.

Hirschfeld, J.W.P. (1994)

Bulletin of the Belgian Mathematical Society - Simon Stevin

On the Impossibility of one Ruler-and-Compass Construction

Vladimir Janković (1996)

Matematički Vesnik

On the incidence structures of polar spaces and quadrics.

Ferrara Dentice, Eva (2002)

Advances in Geometry

On the Infinite Loch Ness monster

John A. Arredondo, Camilo Ramírez Maluendas (2017)

Commentationes Mathematicae Universitatis Carolinae

In this paper we introduce the topological surface called {Infinite Loch Ness monster}, discussing how this name has evolved and how it has been historically understood. We give two constructions of this surface, one of them having translation structure and the other hyperbolic structure.

On the integral geometry of the linear subspaces in a biplanar space

Adrijan Varbanov Borisov (1983)

Archivum Mathematicum

On the integration theorem for Lie groupoids

Anders Kock (1989)

Czechoslovak Mathematical Journal

On the interpoint distance sum inequality.

Xia, Yong, Liu, Hong-Ying (2009)

JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]

On the iso-taxicab trigonometry.

Kocayusufoğlu, Ịsmail, Ada, Tuba (2006)

APPS. Applied Sciences

On the Lifshits Constant for Hyperspaces

K. Leśniak (2007)

Bulletin of the Polish Academy of Sciences. Mathematics

The Lifshits theorem states that any k-uniformly Lipschitz map with a bounded orbit on a complete metric space X has a fixed point provided k < ϰ(X) where ϰ(X) is the so-called Lifshits constant of X. For many spaces we have ϰ(X) > 1. It is interesting whether we can use the Lifshits theorem in the theory of iterated function systems. Therefore we investigate the value of the Lifshits constant for several classes of hyperspaces.

On the linearity of higher-dimensional blocking sets.

Van de Voorde, G. (2010)

The Electronic Journal of Combinatorics [electronic only]

On the loop inequality for euclidean buildings

Jacek Świątkowski (1997)

Annales de l'institut Fourier

We give an estimate for the number of closed loops of given length in the 1-skeleton of a thick euclidean building. This kind of estimate can be used to prove the (RD) property for the subspace of radial functions on ${\tilde{A}}_{n}$ groups, as shown in the paper by A. Valette [same issue].

On the matrices of central linear mappings

Hans Havlicek (1996)

Mathematica Bohemica

We show that a central linear mapping of a projectively embedded Euclidean $n$ -space onto a projectively embedded Euclidean $m$ -space is decomposable into a central projection followed by a similarity if, and only if, the least singular value of a certain matrix has multiplicity $\geq 2 m - n + 1$ . This matrix is arising, by a simple manipulation, from a matrix describing the given mapping in terms of homogeneous Cartesian coordinates.

Currently displaying 221 – 240 of 298