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481.
ANoteon"RearrangementandMatrixProductInequalities"YangZhongpeng(杨忠鹏)(DepartmentMathematics,JilinTeacher'sCollege,Jilin,132011... 相似文献
482.
J.A. Thas 《Journal of Algebraic Combinatorics》1992,1(1):97-102
A unital U with parameter q is a 2 – (q
3 + 1, q + 1, 1) design. If a point set U in PG(2, q
2) together with its (q + 1)-secants forms a unital, then U is called a Hermitian arc. Through each point p of a Hermitian arc H there is exactly one line L having with H only the point p in common; this line L is called the tangent of H at p. For any prime power q, the absolute points and nonabsolute lines of a unitary polarity of PG(2, q
2) form a unital that is called the classical unital. The points of a classical unital are the points of a Hermitian curve in PG(2, q
2).Let H be a Hermitian arc in the projective plane PG(2, q
2). If tangents of H at collinear points of H are concurrent, then H is a Hermitian curve. This result proves a well known conjecture on Hermitian arcs. 相似文献
483.
Kok Seng Chua 《Proceedings of the American Mathematical Society》2005,133(3):661-670
We introduce a family of bi-dimensional theta functions which give uniformly explicit formulae for the theta series of hermitian lattices over imaginary quadratic fields constructed from codes over and , and give an interesting geometric characterization of the theta series that arise in terms of the basic strongly modular lattice . We identify some of the hermitian lattices constructed and observe an interesting pair of nonisomorphic 3/2 dimensional codes over that give rise to isomorphic hermitian lattices when constructed at the lowest level 7 but nonisomorphic lattices at higher levels. The results show that the two alphabets and are complementary and raise the natural question as to whether there are other such complementary alphabets for codes.
484.
Fernando Etayo 《Proceedings of the American Mathematical Society》2003,131(9):2911-2920
In this note we define the measure of holomorphicness of a compact real submanifold of an almost Hermitian manifold . The number verifies the following properties: is a complex submanifold iff ; if is odd, then . Explicit examples of surfaces in are obtained, showing that and that , being the Clifford torus.
485.
WeiYueDING HongYuWANG YouDeWANG 《数学学报(英文版)》2003,19(2):303-312
In this note,we prove that the Schroedinger flow of maps from a closed riemann surface into a compact irreducible Hermitian symmetic space admits a global weak solution.Also,we show the existence of weak solutions to the initial value problem of Heisenberg model with Lie algebra values,which is closely related to the Schroedinger flow on compact Hermitian symmetric spaces. 相似文献
486.
487.
We generalize the Ashtekar–Isham construction for quantizing gauge fields to the case where the configuration variables belong to the space of Hermitian triples, not Hermitian connections. 相似文献
488.
A. A. Klyachko 《Selecta Mathematica, New Series》1998,4(3):419-445
We give an interpretation and a solution of the classical problem of the spectrum of the sum of Hermitian matrices in terms
of stable bundles on the projective plane. 相似文献
489.
Ji-Guang Sun 《BIT Numerical Mathematics》1995,35(3):385-393
Through different orthogonal decompositions of computed eigenvectors we can define different Hermitian backward perturbations for a Hermitian eigenvalue problem. Certain optimal Hermitian backward perturbations are studied. The results show that not all the optimal Hermitian backward perturbations are small when the computed eigenvectors have a small residual and are close to orthonormal.Dedicated to Åke Björck on the occasion of his 60th birthdayThis work was supported by the Swedish Natural Science Research Council under Contract F-FU 6952-302 and the Department of Computing Science, Umeå University. 相似文献
490.
在本文中,我们利用特殊的非均匀网格上的Hermite差分格式来近似四阶常微分方程奇异摄动问题,并证明了其四阶精度的一致收敛性,且在文章的最后给出了其数值结果. 相似文献