Results 11 to 20 of about 77,850 (96)
On the existence of block-transitive combinatorial designs [PDF]
, 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
Splendid and perverse equivalences [PDF]
, 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
Complete spectrum of the infinite-$U$ Hubbard ring using group theory [PDF]
, 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]
, 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
The structure of blocks with a Klein four defect group [PDF]
, 2011 We prove Erdmann’s conjecture [16] stating that every block with a Klein four defect group has a simple module with trivial source, and deduce from this that Puig’s finiteness conjecture holds for source algebras of blocks with a Klein four defect group.
A. Borel +44 more
core +1 more source
Equivalences between blocks of cohomological Mackey algebras [PDF]
, 2014 Let $G$ be a finite group and $(K,\mathcal{O},k)$ be a $p$-modular system "large enough". Let $R=\mathcal{O}$ or $k$. There is a bijection between the blocks of the group algebra $RG$ and the central primitive idempotents (the blocks) of the so-called ...
Rognerud, Baptiste
core +2 more sources
On the number of conjugacy classes of a permutation group [PDF]
, 2014 We prove that any permutation group of degree $n \geq 4$ has at most $5^{(n-1)/3}$ conjugacy classes.Comment: 9 ...
Garonzi, Martino, Maróti, Attila
core +3 more sources
The classification of torsion endo-trivial modules
, 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
Generalized Gray Codes for Local Rank Modulation [PDF]
, 2011 We consider the local rank-modulation scheme in which a sliding window going over a sequence of real-valued variables induces a sequence of permutations.
Eyal En Gad +4 more
core +6 more sources
Stability of the replica-symmetric saddle-point in general mean-field spin-glass models
, 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