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On Isomorphisms of Grassmann Spaces

open access: yes, 2012
We exhibit isomorphisms of Grassmann spaces and their relationship with collineations and embeddings of the underlying projective ...
Havlicek, Hans
core  

Plane Collineations [PDF]

open access: yesEdinburgh Mathematical Notes, 1960
If in a complex projective plane a point P, with coordinate vector x, corresponds to a point p*, with coordinate vector x*, under a non-singular collineation, thenx* = Axwhere A is a non-singular 3×3 matrix, the coordinates and the elements of A being complex numbers.
openaire   +2 more sources

Die Collins: W. Collin, Hofbuchbinder & Ernst Collin, der Autor des Pressbengels

open access: yes, 2016
Die Berliner Buchbinderei W. Collin mit ihren Leitfiguren Wilhelm und Georg Collin, die letzten Hofbuchbinder zu den preußischen Königen und deutschen Kaisern, sowie der Antiquar, Schriftsteller und Redakteur Ernst Collin, zählten zu den bedeutendsten Persönlichkeiten der deutschen Buchbinderei von Mitte des 19ten Jahrhunderts bis in die 1930er des ...
openaire   +2 more sources

Geometrization of a general collineation

open access: yesJournal of Mathematical Physics, 1992
Geometrization of a general collineation means to express the collineation as necessary and sufficient conditions on the kinematic quantities (shear, vorticity, expansion) of the congruence of the vector field generating the collineation. It is shown that the generic form of a collineation is Lξgab = 2ψgab + Hab where Hab is a traceless symmetric ...
openaire   +3 more sources

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