Results 41 to 50 of about 737 (201)

Riemann Solitons on a Spacetime with the Spatially Homogeneous Rotating Metric

open access: yesAxioms
This manuscript presents a comprehensive taxonomy of Riemann solitons within the framework of a spacetime manifold endowed with a metric exhibiting both spatial homogeneity and rotational characteristics.
Majid Ali Choudhary   +2 more
doaj   +1 more source

On rank 4 projective planes

open access: yesInternational 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

Treacher collins syndrome

open access: yesBritish Journal of Plastic Surgery, 1950
Summary Two cases of Treacher Collins syndrome are reported. The family history is shown to be variable, but there appears to be a distinct familial incidence. A comparison has been drawn between the Treacher Collins syndrome and unilateral facial agenesis. The embryology is discussed, and it has been suggested that the causative factor may influence
openaire   +2 more sources

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

open access: yesJournal 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   +3 more
wiley   +1 more source

Ovoids of PG(3,q) stabilized by a central collineation [PDF]

open access: yes, 2003
In this paper we give a short proof that an ovoid of PG(3,q) is stabilized by a non-trivial central collineation of PG(3,q) if and only if it is an elliptic quadric. © 2003 Elsevier Science Ltd.
Brown, Matthew R, Brown, M.
core   +1 more source

On collineation groups of translation planes of order q4

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
Let P be an affine translation plane of order q4 admitting a nonsolvable group G in its translation complement. If G fixes more than q+1 slopes, the structure of G is determined.
V. Jha, N. L. Johnson
doaj   +1 more source

FRANK COLLINS BAKER

open access: yesScience, 1942
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +3 more sources

Hills thought to be mountains: A geobiocultural characterization of island highlands in Canada's continental plain

open access: yesCanadian Geographer / Le géographe canadien, Volume 69, Issue 1, Spring / printemps 2025.
Abstract North America is characterized by an expansive continental plain that has been described as platter‐flat. Yet this central continental plain includes isolated uplands that some people call mountains. The hill‐mountain muddle is a classic problem of geomorphology, arising from the challenge of discriminating continuous, attached forms.
Murray M. Humphries   +3 more
wiley   +1 more source

Intensity gradient based edge detection for pixelated communication systems

open access: yesThe 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   +1 more
wiley   +1 more source

Collineation classification of matter fields in general relativity [PDF]

open access: yes, 2001
Bu tezin, veri tabanı üzerinden yayınlanma izni bulunmamaktadır. Yayınlanma izni olmayan tezlerin basılı kopyalarına Üniversite kütüphaneniz aracılığıyla (TÜBESS üzerinden) erişebilirsiniz.Fen Bilimleri Enstitüsü, Matematik Ana Bilim Dalıoz Bu çalışmada;
Yücel, Necdet
core   +2 more sources

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