Results 281 to 290 of about 1,506,998 (305)
Some of the next articles are maybe not open access.
American Journal of Mathematics, 1957
In dieser Arbeit wird das Verzweigungsverhalten der Erweiterungen algebraischer Funktionenkörper einer Variablen untersucht. Es handelt sich dabei um eine Reihe von teilweise bisher unbekannten Resultaten, welche insbesondere die Verschiedenheit der Verhältnisse in Charakteristik 0 und Charakteristik \( p \neq 0 \) herausstellen.
openaire +2 more sources
In dieser Arbeit wird das Verzweigungsverhalten der Erweiterungen algebraischer Funktionenkörper einer Variablen untersucht. Es handelt sich dabei um eine Reihe von teilweise bisher unbekannten Resultaten, welche insbesondere die Verschiedenheit der Verhältnisse in Charakteristik 0 und Charakteristik \( p \neq 0 \) herausstellen.
openaire +2 more sources
Triple Covers in Algebraic Geometry
American Journal of Mathematics, 1985The aim of the paper under review is to develop a theory of triple covers in algebraic geometry. One of the most important general result obtained says that a triple cover \(X\to Y\) (with X and Y irreducible varieties over an algebraically closed field) is determined by a rank-two vector bundle E and a map \(S^ 3E\to \bigwedge^ 2E\), and conversely ...
openaire +1 more source
Covering points in permutation algebras
Archiv der Mathematik, 2013Let \(K\) be a normal subgroup of a finite group \(H\), and let \(b\) be a block of \(K\) with defect group \(D\) and Brauer correspondent \(b'\) in \(N_G(D)\). \textit{M. E. Harris} and \textit{R. Knörr} [Commun. Algebra 13, 1213-1218 (1985; Zbl 0561.20002)] have shown that the Brauer homomorphism \(\text{Br}_D\) induces a defect group preserving ...
openaire +2 more sources
Communications in Algebra, 1996
In dealing with the central extensions of a finite group G one finds that although covers need not be isomorphic, for each such H there exists a cover for which H is a. homomorphic image [1]. For finite dimensional Lie algebras, covers are isomorphic. We shall show that the second property also holds for Lie algebras.
Peggy Batten, Ernest Stitzinger
openaire +1 more source
In dealing with the central extensions of a finite group G one finds that although covers need not be isomorphic, for each such H there exists a cover for which H is a. homomorphic image [1]. For finite dimensional Lie algebras, covers are isomorphic. We shall show that the second property also holds for Lie algebras.
Peggy Batten, Ernest Stitzinger
openaire +1 more source
Effect Algebras Which Can Be Covered by MV-Algebras
International Journal of Theoretical Physics, 2002Effect algebras are partial abelian monoids with a sort of negation operation: they yield a generalization of various kinds of structures currently used in the algebraic treatment of operator algebras, including Chang's MV algebras. The main result of this paper gives added evidence to the intuition that MV algebras stand to effect algebras as Boolean ...
openaire +2 more sources
2004
Let p be a prime number and let G be a finite group. The subgroup p(G) ⊂ G is defined as the group generated by all elements in G having as order a power of p. Equivalent definitions of p(G) are: (i) p(G) is the smallest normal subgroup such that the factor group G/p(G) has no elements with order p.
Jean Fresnel, Marius van der Put
openaire +1 more source
Let p be a prime number and let G be a finite group. The subgroup p(G) ⊂ G is defined as the group generated by all elements in G having as order a power of p. Equivalent definitions of p(G) are: (i) p(G) is the smallest normal subgroup such that the factor group G/p(G) has no elements with order p.
Jean Fresnel, Marius van der Put
openaire +1 more source
Irredundant Coverings, Tolerances, and Related Algebras
2018This chapter deals with rough approximations defined by tolerance relations that represent similarities between the elements of a given universe of discourse. We consider especially tolerances induced by irredundant coverings of the universe U. This is natural in view of Pawlak’s original theory of rough sets defined by equivalence relations: any ...
Järvinen J., Radeleczki, S.
openaire +2 more sources
On algebraic methods in covering radius problems
1995We discuss how characters of finite fields and exponential sums can be applied to covering radius problems. In particular we study the covering radius of BCH codes, and upper bounds on the covering radius of a code with a given dual distance.
Iiro S. Honkala +2 more
openaire +1 more source
Koszul algebras and finite Galois coverings
Science in China Series A: Mathematics, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhao, Deke, Han, Yang
openaire +2 more sources