Results 41 to 50 of about 496,846 (263)

Permutation branes [PDF]

open access: yesJournal of High Energy Physics, 2003
N-fold tensor products of a rational CFT carry an action of the permutation group S_N. These automorphisms can be used as gluing conditions in the study of boundary conditions for tensor product theories. We present an ansatz for such permutation boundary states and check that it satisfies the cluster condition and Cardy's constraints.
openaire   +3 more sources

Permutation Reconstruction [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2006
In this paper, we consider the problem of permutation reconstruction. This problem is an analogue of graph reconstruction, a famous question in graph theory. In the case of permutations, the problem can be stated as follows: In all possible ways, delete $k$ entries of the permutation $p=p_1p_2p_3...p_n$ and renumber accordingly, creating $n \choose k$
openaire   +2 more sources

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

Image Encryption Algorithm Based on Substitution Principle and Shuffling Scheme [PDF]

open access: yesEngineering and Technology Journal, 2020
This research presents a method of image encryption that has been designed based on the algorithm of complete shuffling, transformation of substitution box, and predicated image crypto-system. This proposed algorithm presents extra confusion in the first
Atyaf Hamad, Alaa Farhan
doaj   +1 more source

Permutation glass [PDF]

open access: yesPhysical Review E, 2018
The field of disordered systems provides many simple models in which the competing influences of thermal and non-thermal disorder lead to new phases and non-trivial thermal behavior of order parameters. In this paper, we add a model to the subject by considering a system where the state space consists of various orderings of a list. As in spin glasses,
openaire   +3 more sources

To permute or not to permute [PDF]

open access: yesBioinformatics, 2006
Abstract Permutation test is a popular technique for testing a hypothesis of no effect, when the distribution of the test statistic is unknown. To test the equality of two means, a permutation test might use a test statistic which is the difference of the two sample means in the univariate case.
Yifan, Huang   +3 more
openaire   +2 more sources

Analysis of cubic permutation polynomials for turbo codes

open access: yes, 2012
Quadratic permutation polynomials (QPPs) have been widely studied and used as interleavers in turbo codes. However, less attention has been given to cubic permutation polynomials (CPPs).
D. Tărniceriu   +14 more
core   +1 more source

Estimating significances of differences between slopes: A new methodology and software [PDF]

open access: yesComputational Ecology and Software, 2013
Determining the significance of slope differences is a common requirement in studies of self-thinning, ontogeny and sexual dimorphism, among others. This has long been carried out testing for the overlap of the bootstrapped 95% confidence intervals of ...
Vasco M. N. C. S. Vieira, Joel Creed
doaj  

Coprime permutations

open access: yes, 2022
Let $C(n)$ denote the number of permutations $σ$ of $[n]=\{1,2,\dots,n\}$ such that $\gcd(j,σ(j))=1$ for each $j\in[n]$. We prove that for $n$ sufficiently large, $n!/3.73^n < C(n) < n!/2.5^n$.
openaire   +3 more sources

Image Encryption Based on Pixel-Level Diffusion with Dynamic Filtering and DNA-Level Permutation with 3D Latin Cubes

open access: yesEntropy, 2019
Image encryption is one of the essential tasks in image security. In this paper, we propose a novel approach that integrates a hyperchaotic system, pixel-level Dynamic Filtering, DNA computing, and operations on 3D Latin Cubes, namely DFDLC, for image ...
Taiyong Li   +4 more
doaj   +1 more source

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