Sphericity and Sphericity Indices. A Non-Mathematical Approach on the Mathematical Basis for Restructuring Stereochemistry
نویسندگان
چکیده
منابع مشابه
Sphericity and Sphericity Indices. A Non-Mathematical Approach on the Mathematical Basis for Restructuring Stereochemistry
Topicity terms for stereochemical relationships (homotopic, enantiotopic, diastereotopic, etc.) and topicity terms for stereochemical attributes (chirotopic and achiotopic) have been combined to discuss the stereochemistry of tetrahedral molecules. Stereochemical discussions due to such combined usage have exhibited complicated features that would cause misunderstanding or confusion. On the oth...
متن کاملA Bluffer’s Guide to ... Sphericity
The use of repeated measures, where the same subjects are tested under a number of conditions, has numerous practical and statistical benefits. For one thing it reduces the error variance caused by between-group individual differences, however, this reduction of error comes at a price because repeated measures designs potentially introduce covariation between experimental conditions (this is be...
متن کاملTesting for Sphericity in Panels
Abstract This manuscript considers locally best invariant tests for sphericity in heterogeneous panel models, which are given as weighted sums of individual tests. An exact integral expression and a saddlepoint approximation for their null distributions are provided. The saddlepoint approximation generalizes the earlier result of Broda, Paolella, and Tchopourian (2006). Despite having been deri...
متن کاملThe sphericity of the complex of non-degenerate subspaces
We prove that the complex of proper non-trivial non-degenerate subspaces of a finitedimensional vector space endowed with a non-degenerate sesquilinear form is homotopy equivalent to a wedge of spheres. Additionally, we show that the same is true for a slightly wider class of simplicial complexes, the so-called generalized Phan geometries of type An. These generalized Phan geometries occur as r...
متن کاملSphericity of a Protein via Β-complex
Abstract. Biology is a hot area of research in these days. One of the hottest issues is about the structure of bio-molecules which has been known one of the most important factors related to the functions of the protein. Hence, the global and local descriptors of the spatial structure are often needed. In this paper, we provide a measure for the sphericity of a protein. The measure is based on ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Computer Chemistry, Japan
سال: 2004
ISSN: 1347-1767,1347-3824
DOI: 10.2477/jccj.3.113