منابع مشابه
On the Blocks of Interpoint Distances
We study the blocks of interpoint distances, their distributions, correlations, independence and the homogeneity of their total variances. We discuss the exact and asymptotic distribution of the interpoint distances and their average under three models and provide connections between the correlation of interpoint distances with their vector correlation and test of sphericity. We discuss testing...
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Several studies have reported the advantages of the field-in-field (FIF) technique in breast radiotherapy, including dose reduction in the lungs by using lung field blocks. We evaluated the FIF technique with lung blocks for breast tangential radiotherapy. Sixteen patients underwent free breathing (FB) computed tomography (CT), followed by two CT procedures performed during breath hold after li...
متن کاملPrincipal 2-Blocks and Sylow 2-Subgroups
Let G be a finite group with Sylow 2-subgroup P 6 G. Navarro–Tiep–Vallejo have conjectured that the principal 2-block of NG(P) contains exactly one irreducible Brauer character if and only if all odd-degree ordinary irreducible characters in the principal 2-block of G are fixed by a certain Galois automorphism σ. By recent work of Navarro–Vallejo it suffices to show this conjecture holds for al...
متن کاملOn the Inradius of a Tangential Quadrilateral
We give a survey of known formulas for the inradius r of a tangential quadrilateral, and derive the possibly new formula r = 2 √ (M − uvx)(M − vxy)(M − xyu)(M − yuv) uvxy(uv + xy)(ux + vy)(uy + vx) where u, v, x and y are the distances from the incenter to the vertices, and M = 1 2 (uvx + vxy + xyu + yuv).
متن کاملOn Tangential Varieties of Rational Homogeneous Varieties
We determine which tangential varieties of homogeneously embedded rational homogeneous varieties are spherical. We determine the homogeneous coordinate rings and rings of covariants of the tangential varieties of homogenously embedded compact Hermitian symmetric spaces (CHSS). We give bounds on the degrees of generators of the ideals of tangential varieties of CHSS and obtain more explicit info...
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ژورنال
عنوان ژورنال: Discrete Mathematics
سال: 1976
ISSN: 0012-365X
DOI: 10.1016/0012-365x(76)90012-1