Results 41 to 50 of about 3,108 (166)

Fuzzy collineations of 3-dimensional fuzzy projective space from 4-dimensional fuzzy vector space

AIMS Mathematics
In this paper, the fuzzy counterparts of the collineations defined in classical projective spaces are defined in a 3-dimensional fuzzy projective space derived from a 4-dimensional fuzzy vector space. The properties of fuzzy projective space $ (\lambda, \
Elif Altintas Kahriman
doaj   +1 more source

Domesticity in generalized quadrangles [PDF]

, 2012
An automorphism of a generalized quadrangle is called domestic if it maps no chamber, which is here an incident point-line pair, to an opposite chamber. We call it point-domestic if it maps no point to an opposite one and line-domestic if it maps no line
Temmermans, Beukje, Thas, Joseph, Van Maldeghem, Hendrik   +2 more
core   +1 more source

Translation planes of even order in which the dimension has only one odd factor

International Journal of Mathematics and Mathematical Sciences, 1980
Let G be an irreducible subgroup of the linear translation complement of a finite translation plane of order qd where q is a power of 2. GF(q) is in the kernel and d=2sr where r is an odd prime. A prime factor of |G| must divide (qd+1)∏i=1d(qi−1).
T. G. Ostrom
doaj   +1 more source

Elementary Abelian 2-subgroups in an Autotopism Group of a Semifield Projective Plane

Известия Иркутского государственного университета: Серия "Математика", 2020
Elementary Abelian 2-subgroups in an Autotopism Group of a Semifield Projective Plane} We investigate the hypotheses on a solvability of the full collineation group for non-Desarguesian semifield projective plane of a finite order (the question 11.76 in ...
O. V. Kravtsova
doaj   +1 more source

symmetries of the Ricci tensor of static space times with maximal symmetric transverse spaces

, 2006
Static space times with maximal symmetric transverse spaces are classified according to their Ricci collineations. These are investigated for non-degenerate Ricci tensor ($det.(R_{\alpha}) \neq 0$).
A.Z. Petro, Cai Rong-Gen, G.H. Katzin, G.H. Katzin, M Akbar   +4 more
core   +2 more sources

On rank 4 projective planes

International Journal of Mathematics and Mathematical Sciences, 1981
Let a finite projective plane be called rank m plane if it admits a collineation group G of rank m, let it be called strong rank m plane if moreover GP=G1 for some point-line pair (P,1).
O. Bachmann
doaj   +1 more source

Finite geometries and diffractive orbits in isospectral billiards

, 2005
Several examples of pairs of isospectral planar domains have been produced in the two-dimensional Euclidean space by various methods. We show that all these examples rely on the symmetry between points and blocks in finite projective spaces; from the ...
Bonisoli A, Brooks R, Bérard P, Chapman S J, Dinitz J H, Giraud O, Gordon C S, Hirschfeld J W P, Hughes D R, Kac M, Okada Y, Olivier Giraud, Sunada T, Thain A   +13 more
core   +1 more source

Symmetries of Bianchi I space-times [PDF]

, 2000
All diagonal proper Bianchi I space-times are determined which admit certain important symmetries. It is shown that for Homotheties, Conformal motions and Kinematic Self-Similarities the resulting space-times are defined explicitly in terms of a set of ...
Belinski V. A., Bilyalov R. F., Carter B., Coley A. A., Coley A. A., Datta B. K., Geroh R. P., Hall G. S., Hall G. S., Hall G. S., Hall G. S., Kolassis C. A., Maartens R., Maartens R., Melfo A., Michael Tsamparlis, Pantelis S. Apostolopoulos, Rendall A. D., Sintes A. M., van den Hoogen R. J.   +19 more
core   +3 more sources

On Quasi‐Hermitian Varieties in Even Characteristic and Related Orthogonal Arrays

Journal of Combinatorial Designs, Volume 33, Issue 3, Page 109-122, March 2025.
ABSTRACT In this article, we study the BM quasi‐Hermitian varieties, laying in the three‐dimensional Desarguesian projective space of even order. After a brief investigation of their combinatorial properties, we first show that all of these varieties are projectively equivalent, exhibiting a behavior which is strikingly different from what happens in ...
Angela Aguglia, Luca Giuzzi, Alessandro Montinaro, Viola Siconolfi   +3 more
wiley   +1 more source

Intensity gradient based edge detection for pixelated communication systems

The Journal of Engineering, Volume 2019, Issue 12, Page 8463-8470, December 2019., 2019
Pixelated optical communication systems transmit data using a series of encoded pixelated images. The decoding of these pixelated images is important for reliable data communication. This study proposes a novel intensity gradient‐based edge detection (IGED) method for the received pixelated images.
Md Ahasan Kabir, Md Rubaiyat Hossain Mondal   +1 more
wiley   +1 more source