Results 51 to 60 of about 945 (188)
The Collins: W. Collin, Court Bookbinders & Ernst Collin, the Author of the Pressbengel
, 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 ...
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On the symmetric block design with parameters (153, 57, 21)
Le 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_{17·16}B) Up to isomorphism and
Rexhep Gjergji
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British 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
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Zhongguo Jianchuan YanjiuObjectivesTo improve the ability of autonomous underwater vehicle (AUV) formations to perform tasks in complex obstacle scenarios, a distributed three-dimensional affine formation shape maneuver control method is proposed for multi-AUV formations ...
Mingqi YAO +4 more
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Journal 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
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Products of central collineations
Linear Algebra and its Applications, 1978 AbstractAn n by n matrix M over a (commutative) field F is said to be central if M − I has rank 1. We say that M is an involution if M2=I; if M is also central we call M a simple involution. We will prove that any n-by-n matrix M satisfying detM=±1 is the product of n+2 or fewer simple involutions.
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Notes on Cooperstein Ovoids in Finite Geometries of Type 𝖤6,1
MathematicsA Cooperstein ovoid is a set of q8+q4+1 pairwise non-collinear points in the Lie incidence geometry E6,1(q). They were introduced by Cooperstein twenty-six years ago, motivated by the fact that possible non-existence of them would imply non-existence of ...
Hendrik Van Maldeghem
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Figure and affect in Collins [PDF]
Textual Practice, 2010 On the eventness of sensation ...
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Collineation groups with perspectivities
Journal of Algebra, 2004 Let \({\mathcal T}\) be a finite translation plane. The collineation group of \({\mathcal T}\) is a semi-direct product of the translation group and the translation complement. The translation complement is a semi-linear transformation group. A subgroup of the translation complement consisting of linear collineations is called a linear collineation ...
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On the orbits of collineation groups [PDF]
Mathematische Zeitschrift, 1967 In this paper we consider some results on the orbits of groups of collineations, or, more generally, on the point and block classes of tactical decompositions, on symmetric balanced incomplete block designs (symmetric BIBD = (v, k, 2)system=finite 2-plane), and we consider generalizations to (not necessarily symmetric) BIBD and other combinatorial ...
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