Results 11 to 20 of about 118,048 (162)

Complete Caps in Affine Geometry AG(n, 3)

open access: yesMathematical Problems of Computer Science, 2022
We consider the problem of constructing complete caps in affine geometry AG(n, 3) of dimension n over the field F3 of order three. We will take the elements of F3 to be 0, 1 and 2. A cap is a set of points, no three of which are collinear.
Karen I. Karapetyan
doaj   +1 more source

One dimensional metrical geometry [PDF]

open access: yes, 2007
One dimensional metrical geometry may be developed in either an affine or projective setting over a general field using only algebraic ideas and quadratic forms.
Wildberger, N J
core   +2 more sources

Smooth projective horospherical varieties of Picard group $\mathbb{Z}^2$ [PDF]

open access: yesÉpijournal de Géométrie Algébrique, 2020
We classify all smooth projective horospherical varieties of Picard group $\mathbb{Z}^2$ and we give a first description of their geometry via the Log Minimal Model Program.
Boris Pasquier
doaj   +1 more source

Pairwise transitive 2-designs [PDF]

open access: yes, 2015
We classify the pairwise transitive 2-designs, that is, 2-designs such that a group of automorphisms is transitive on the following five sets of ordered pairs: point-pairs, incident point-block pairs, non-incident point-block pairs, intersecting block ...
Devillers, Alice, Praeger, Cheryl E.
core   +1 more source

Applications of a Particular Four-Dimensional Projective Geometry to Galactic Dynamics

open access: yesGalaxies, 2018
Relativistic location systems that extend relativistic positioning systems show that pseudo-Riemannian space-time geometry is somehow encompassed in a particular four-dimensional projective geometry.
Jacques L. Rubin
doaj   +1 more source

EPIPOLAR GEOMETRY BETWEEN PHOTOGRAMMETRY AND COMPUTER VISION – A COMPUTATIONAL GUIDE [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Stereo image orientation is one of the major topics in computer vision, photogrammetry, and robotics. The stereo vision problem solution represents the basic element of the multi-view Structure from Motion SfM in computer vision and photogrammetry.A ...
B. Alsadik, N. A. Abdulateef
doaj   +1 more source

Linear Toric Fibrations [PDF]

open access: yes, 2013
These notes are based on three lectures given at the 2013 CIME/CIRM summer school. The purpose of this series of lectures is to introduce the notion of a toric fibration and to give its geometrical and combinatorial characterizations.
A. Dickenstein   +12 more
core   +1 more source

THE ROLE OF PROJECTIVE GEOMETRY IN TALIAN EDUCATION AND INSTITUTIONS AT THE END OF THE 19TH CENTURY

open access: yesRevista de História da Educação Matemática, 2023
At the end of the 19th century, projective geometry was at the basis of most geometric research in Italy, and of much other research work in Europe. Furthermore, through its close connection with descriptive geometry, it seemed particularly responsive to
Marta Menghini
doaj  

Projective geometry for blueprints [PDF]

open access: yes, 2012
In this note, we generalize the Proj-construction from usual schemes to blue schemes. This yields the definition of projective space and projective varieties over a blueprint.
Lorscheid, Oliver, Peña, Javier López
core   +3 more sources

Strongly essential flows on irreducible parabolic geometries [PDF]

open access: yes, 2015
We study the local geometry of irreducible parabolic geometries admitting strongly essential flows; these are flows by local automorphisms with higher-order fixed points. We prove several new rigidity results, and recover some old ones for projective and
Melnick, Karin, Neusser, Katharina
core   +1 more source

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