Results 51 to 60 of about 2,675 (232)

Flag-transitive collineation groups of nite projective spaces

open access: yes, 1962
An unpublished result of Perin [20] states that a subgroup of FL(n, q), n 23, which induces a primitive rank 3 group of even order on the set of points of PG(n 1, q), necessarily preset-es a symplectic polarity.
D. G. Higman
semanticscholar   +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

Treacher Collins syndrome

open access: yesJournal of Oral and Maxillofacial Pathology, 2011
Treacher Collins syndrome (TCS) is a rare autosomal dominant disorder of craniofacial development. It is a congenital malformation of first and second branchial arch which may affect the size and shape of the ears, eyelids, cheek bones, and jaws. The extent of facial deformity varies from one affected individual to another.
Prachi Shete   +3 more
openaire   +3 more sources

Matrix spread sets of p-primitive semifield planes

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
In this article we present the matrix spread sets of the p-primitive planes of order p4 where p=3,5,7,11.
M. Cordero
doaj   +1 more source

Collineations of a symmetric 2-covariant tensor: Ricci collineations [PDF]

open access: yesJournal of Mathematical Physics, 2013
The infinitesimal transformations that leave invariant a two-covariant symmetric tensor are studied. The interest of these symmetry transformations lays in the fact that this class of tensors includes the energy-momentum and Ricci tensors. We find that in most cases the class of infinitesimal generators of these transformations is a finite dimensional ...
openaire   +3 more sources

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   +4 more sources

Figure and affect in Collins [PDF]

open access: yesTextual Practice, 2010
On the eventness of sensation ...
openaire   +2 more sources

The Collins: W. Collin, Court Bookbinders & Ernst Collin, the Author of the Pressbengel

open access: yes, 2016
The Berlin-based firm of W. Collin led by Wilhelm and Georg Collin and the antiquarian, author, and editor Ernst Collin were among the leaders in German bookbinding trade and writings about the trade from the mid-1800's into the mid-1930's. During that same time, bookbinding experienced many transformations, as well, moving from a trade practiced in ...
openaire   +2 more sources

Matter and Ricci Collineations [PDF]

open access: yes, 2013
The infinitesimal transformations that leave invariant a two-covariant symmetric tensor are studied. The interest of these symmetry transformations lays in the fact that this class of tensors includes the energy-momentum and Ricci tensors. We find that in most cases the class of infinitesimal generators of these transformations is a finite dimensional ...
openaire   +3 more sources

On the symmetric block design with parameters (153, 57, 21)

open access: yesLe Matematiche, 2009
In this paper it is proved that:A) Up to isomorphism and duality there are exactly two possible orbital structures for a putative symmetric block design with parameters (153, 57, 21) constructed using the Frobenius group F_{17ยท16}B) Up to isomorphism and
Rexhep Gjergji
doaj  

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