Results 11 to 20 of about 494 (47)
The K-theory of toric varieties in positive characteristic [PDF]
, 2012 We show that if X is a toric scheme over a regular ring containing a field then the direct limit of the K-groups of X taken over any infinite sequence of nontrivial dilations is homotopy invariant. This theorem was known in characteristic 0.
Cortiñas, Guillermo +3 more
core +3 more sources
Seminormal and subnormal subgroup lattices for transitive permutation groups [PDF]
Journal of the Australian Mathematical Society, 2006 AbstractVarious lattices of subgroups of a finite transitive permutation group G can be used to define a set of ‘basic’ permutation groups associated with G that are analogues of composition factors for abstract finite groups. In particular G can be embedded in an iterated wreath product of a chain of its associated basic permutation groups.
openaire +2 more sources
Seminormal graded rings and weakly normal projective varieties
International Journal of Mathematics and Mathematical Sciences, Volume 8, Issue 2, Page 231-240, 1985., 1985 This paper is concerned with the seminormality of reduced graded rings and the weak normality of projective varieties. One motivation for this investigation is the study of the procedure of blowing up a non‐weakly normal variety along its conductor ideal.
John V. Leahy, Marie A. Vitulli
wiley +1 more source
Seminormal forms and Gram determinants for cellular algebras [PDF]
, 2007 This paper develops an abstract framework for constructing ``seminormal forms'' for cellular algebras. That is, given a cellular R-algebra A which is equipped with a family of JM-elements we give a general technique for constructing orthogonal bases for ...
Mathas, Andrew, Soriano, Marcos
core +3 more sources
Jucys-Murphy elements and Weingarten matrices [PDF]
, 2010 We provide a compact proof of the recent formula of Collins and Matsumoto for the Weingarten matrix of the orthogonal group using Jucys-Murphy elements.Comment: v2: added a ...
Zinn-Justin, P.
core +1 more source
Journal of Algebra, 1994 A subgroup \(H\) of a finite group \(G\) is defined to be seminormal in \(G\) if it permutes with every subgroup of \(G\) whose order is relatively prime to the order of \(H\). Clearly a subgroup of prime index in \(G\) is seminormal in \(G\), and the author shows this is necessary when \(G\) is simple and \(H\) is proper and nontrivial.
openaire +1 more source
The Neron-Severi group of a proper seminormal complex variety
, 2008 We prove a Lefschetz (1,1)-Theorem for proper seminormal varieties over the complex numbers. The proof is a non-trivial geometric argument applied to the isogeny class of the Lefschetz 1-motive associated to the mixed Hodge structure on H^2.Comment: 16 ...
Andreas Rosenschon +16 more
core +1 more source
Cryptanalysis of group-based key agreement protocols using subgroup distance functions
, 2007 We introduce a new approach for cryptanalysis of key agreement protocols based on noncommutative groups. This approach uses functions that estimate the distance of a group element to a given subgroup.
D. Garber +8 more
core +1 more source
The system of sets of lengths in Krull monoids under set addition [PDF]
, 2015 Let $H$ be a Krull monoid with class group $G$ and suppose that each class contains a prime divisor. Then every element $a \in H$ has a factorization into irreducible elements, and the set $\mathsf L (a)$ of all possible factorization lengths is the set ...
Geroldinger, Alfred, Schmid, Wolfgang
core +4 more sources
On the homomorphisms between scalar generalized Verma modules
, 2012 We study the homomorphisms between scalar generalized Verma modules. We conjecture that any homomorphism between is composition of elementary homomorphisms.
Bernstein +9 more
core +1 more source