Results 51 to 60 of about 2,675 (232)
Flag-transitive collineation groups of nite projective spaces
An unpublished result of Perin [20] states that a subgroup of FL(n, q), n 23, which induces a primitive rank 3 group of even order on the set of points of PG(n 1, q),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
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On collineation groups of translation planes of order q4
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
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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
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Matrix spread sets of p-primitive semifield planes
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
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Collineations of a symmetric 2-covariant tensor: Ricci collineations [PDF]
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 ...
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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
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Figure and affect in Collins [PDF]
On the eventness of sensation ...
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The Collins: W. Collin, Court Bookbinders & Ernst Collin, the Author of the Pressbengel
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 ...
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Matter and Ricci Collineations [PDF]
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 ...
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On the symmetric block design with parameters (153, 57, 21)
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