Results 61 to 70 of about 5,017 (222)
On Invariant Notions of Segre Varieties in Binary Projective Spaces
, 2010 Invariant notions of a class of Segre varieties $\Segrem(2)$ of PG(2^m - 1, 2) that are direct products of $m$ copies of PG(1, 2), $m$ being any positive integer, are established and studied.
A. Bichara +22 more
core +5 more sources
Spacelike Ricci Inheritance Vectors in a Model of String Cloud and String Fluid Stress Tensor
, 2005 We study the consequences of the existence of spacelike Ricci inheritance vectors (SpRIVs) parallel to $x^a$ for model of string cloud and string fluid stress tensor in the context of general relativity.
Carot J +9 more
core +1 more source
Collineations of a symmetric 2-covariant tensor: Ricci collineations [PDF]
Journal 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
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 ...
openaire +2 more sources
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
openaire +4 more sources
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
openaire +3 more sources
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.
openaire +3 more sources
Figure and affect in Collins [PDF]
Textual Practice, 2010 On the eventness of sensation ...
openaire +2 more sources
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 ...
openaire +3 more sources
Genome-wide identification and characterization of the bHLH gene family and analysis of their potential relevance to chlorophyll metabolism in Raphanus sativus L. [PDF]
BMC Genomics, 2022 Wang R, Li Y, Gao M, Han M, Liu H.
europepmc +1 more source