Results 11 to 20 of about 68,362 (142)

On the existence of block-transitive combinatorial designs [PDF]

open access: yes, 2010
Block-transitive Steiner $t$-designs form a central part of the study of highly symmetric combinatorial configurations at the interface of several disciplines, including group theory, geometry, combinatorics, coding and information theory, and ...
Huber, Michael
core   +4 more sources

Block Sensitivity of Minterm-Transitive Functions [PDF]

open access: yes, 2010
Boolean functions with symmetry properties are interesting from a complexity theory perspective; extensive research has shown that these functions, if nonconstant, must have high `complexity' according to various measures.
Drucker, Andrew
core   +3 more sources

Imprimitively generated designs [PDF]

open access: yes, 2022
2022 Summer.Includes bibliographical references.Designs are a type of combinatorial object which uniformly cover all pairs in a base set V with subsets of V known as blocks.
Lear, Aaron
core  

Trivial source bimodule rings for blocks and p-permutation equivalences [PDF]

open access: yes, 2009
We associate with any p-block of a finite group a Grothendieck ring of certain p-permutation bimodules. We extend the notion of p-permutation equivalences introduced by Boltje and Xu [4] to source algebras of p-blocks of finite groups.
Linckelmann, M.
core   +1 more source

Splendid and perverse equivalences [PDF]

open access: yes, 2014
Inspired by the works of Rickard on splendid equivalences and of Chuang and Rouquier on perverse equivalences, we are here interested in the combination of both, a splendid perverse equivalence.
Dreyfus-Schmidt, Léo
core   +1 more source

On saturated fusion systems and Brauer indecomposability of Scott modules [PDF]

open access: yes, 2011
Let $p$ be a prime number, $G$ a finite group, $P$ a $p$-subgroup of $G$ and $k$ an algebraically closed field of characteristic $p$. We study the relationship between the category $\Ff_P(G)$ and the behavior of $p$-permutation $kG$-modules with vertex ...
Alperin   +14 more
core   +1 more source

The classification of torsion endo-trivial modules

open access: yes, 2007
This paper is a major step in the classification of endotrivial modules over p-groups. Let G be a finite p-group and k be a field of characteristic p. A kG-module M is an endo-trivial module if {\End_k(M)\cong k\oplus F} as kG-modules, where F is a free ...
Carlson, Jon F., Thevenaz, Jacques
core   +1 more source

Complete spectrum of the infinite-$U$ Hubbard ring using group theory [PDF]

open access: yes, 2014
We present a full analytical solution of the multiconfigurational strongly-correlated mixed-valence problem corresponding to the $N$-Hubbard ring filled with $N-1$ electrons, and infinite on-site repulsion.
Alessandro Soncini   +5 more
core   +1 more source

On Maximum Contention-Free Interleavers and Permutation Polynomials over Integer Rings [PDF]

open access: yes, 2005
An interleaver is a critical component for the channel coding performance of turbo codes. Algebraic constructions are of particular interest because they admit analytical designs and simple, practical hardware implementation. Contention-free interleavers
Takeshita, Oscar Y.
core   +2 more sources

Stability of the replica-symmetric saddle-point in general mean-field spin-glass models

open access: yes, 2010
Within the replica approach to mean-field spin-glasses the transition from ergodic high-temperature behaviour to the glassy low-temperature phase is marked by the instability of the replica-symmetric saddle-point.
Andreas Engel   +20 more
core   +1 more source

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