Results 51 to 60 of about 825,768 (324)

Photochemical permutation of thiazoles, isothiazoles and other azoles. [PDF]

open access: yesNature
Thiazoles and isothiazoles are privileged motifs in drug and agrochemical discovery1,2. The synthesis of these derivatives is generally approached, designed and developed on a case-by-case basis. Sometimes, the lack of robust synthesis methods to a given
Roure B   +12 more
europepmc   +2 more sources

On the symmetry of good nonlinear codes [PDF]

open access: yes, 1970
It is shown that there are arbitrarily long "good" (in the sense of Gilbert) binary block codes that are preserved under very large permutation groups. This result contrasts sharply with the properties of linear codes: it is conjectured that long cyclic ...
McEliece, Robert J.
core   +1 more source

Join Products K2,3 + Cn

open access: yesMathematics, 2020
The crossing number cr ( G ) of a graph G is the minimum number of edge crossings over all drawings of G in the plane. The main goal of the paper is to state the crossing number of the join product K 2 , 3 + C n for the complete ...
Michal Staš
doaj   +1 more source

On knot separability of hypergraphs and its application towards infectious disease management

open access: yesAIMS Mathematics, 2023
The article deals with some theoretical aspects of hypergraph connectivity from the knot view. The strength of knots is defined and investigates some of their properties.
Raju Doley, Saifur Rahman, Gayatri Das
doaj   +1 more source

4-CYCLE FREE APM LDPC CODES WITH AN EXPLICIT CONSTRUCTION [PDF]

open access: yesJournal of Algebraic Systems, 2021
Recently, a class of low-density parity-check codes based on affine permutation matrices, called APM-LDPC codes, have been considered which have some advantages than quasi-cyclic (QC) LDPC codes in terms of minimum-distance, cycle distribution, and error-
Z. Gholami, M. Gholami
doaj   +1 more source

Descent sets of cyclic permutations [PDF]

open access: yesAdvances in Applied Mathematics, 2011
22 pages, final journal ...
openaire   +2 more sources

Chosen-Key Secure Even-Mansour Cipher from a Single Permutation

open access: yesIACR Transactions on Symmetric Cryptology, 2023
At EUROCRYPT 2015, Cogliati and Seurin proved that the 4-round Iterated Even-Mansour (IEM) cipher with Independent random Permutations and no key schedule EMIP4(k, u) = k⊕p4 ( k⊕p3 ( k⊕p2 (k⊕p1 (k⊕u))))  is sequentially indifferentiable from an ideal ...
Shanjie Xu, Qi Da, Chun Guo
doaj   +1 more source

Cyclic Coset Orbifolds [PDF]

open access: yes, 1999
We apply the new orbifold duality transformations to discuss the special case of cyclic coset orbifolds in further detail. We focus in particular on the case of the interacting cyclic coset orbifolds, whose untwisted sectors are Z_\lambda(permutation ...
Bardakçi K.   +8 more
core   +2 more sources

On the class of square Petrie matrices induced by cyclic permutations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
Let n≥2 be an integer and let P={1,2,…,n,n+1}. Let Zp denote the finite field {0,1,2,…,p−1}, where p≥2 is a prime. Then every map σ on P determines a real n×n Petrie matrix Aσ which is known to contain information on the dynamical properties such as ...
Bau-Sen Du
doaj   +1 more source

A linear time algorithm for the orbit problem over cyclic groups [PDF]

open access: yes, 2014
The orbit problem is at the heart of symmetry reduction methods for model checking concurrent systems. It asks whether two given configurations in a concurrent system (represented as finite strings over some finite alphabet) are in the same orbit with ...
Anthony Widjaja, Lin, Sanming Zhou
core   +1 more source

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