Titlebook: Coding Theory and Design Theory; Part I Coding Theory Dijen Ray-Chaudhuri Conference proceedings 1990 Springer-Verlag New York, Inc. 1990 C

hereditary

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The Incidence Algebra of a Uniform Poset,d by ., and entries.and . . = . . = 0. The . of . is the real matrix algebra generated by . ., . ., . . (0 ≤ . ≤ .). . is . if there exists real numbers e., e., f., (1 ≤ . ≤ .) (satisfying a certain condition) such that

考博

Self-Orthogonal Codes and the Topology of Spinor Groups,cribe the correspondence and discuss various techniques from the algebraic topology of Spin(n) which may be useful in studying self-orthogonal codes. In particular, Quillen’s results in equivariant cohomology theory coupled with some Morse theory may allow one to address certain questions on the min

freight

STELL

Aromatic

生气地

Combinatorial Characters of Quasigroups,’ hands, along both Dedekind’s original group determinant approach and Frobenius’ new approach that is now considered part of the theory of association schemes. Shortly afterwards, representation theory methods using matrices took over, and have dominated ever since.

行乞

Urszula Piskurewicz,Luis Lopez-Molinat practical problem is that of channel phase shifts which cause a rotation of every 2-dimensional constituent of a 2.-dimensional signal through the same multiple of 90°. We describe the structure of coset codes and an algebraic method of resolving this phase ambiguity.

人造

Masahiko Otani,Lipeng Zheng,Naoto Kawakamitries. Our preliminary investigations indicate that there are many interesting problems on the loops whose resolution may provide us with a new insight into Sperner Theory, Matroid Theory and Extremal Set Theory.