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On the computational complexity of determining polyatomic structures by X-rays

Identifieur interne : 000C73 ( PascalFrancis/Checkpoint ); précédent : 000C72; suivant : 000C74

On the computational complexity of determining polyatomic structures by X-rays

Auteurs : R. J. Gardner [États-Unis] ; P. Gritzmann [Allemagne] ; D. Prangenberg [Allemagne]

Source :

Theoretical computer science [ 0304-3975 ] ; 2000.

RBID : Pascal:00-0085696

Descripteurs français

Pascal (Inist)
- Tomographie, Complexité calcul, Algorithme, Temps polynomial, Problème NP complet, Treillis, Ordonnancement, Table contingence, Consistance, Stabilité, Théorème unicité, Stisfiabilité.

English descriptors

KwdEn :
- Algorithm, Computational complexity, Consistency, Contingency table, Lattice, NP complete problem, Polynomial time, Scheduling, Stability, Stisfiability, Tomography, Uniqueness theorem.

Abstract

The problem of recovering the structure of crystalline materials from their discrete X-rays is of fundamental interest in many practical applications. An important special case concerns determining the position of atoms of several different types in the integer lattice, given the number of each type lying on each line parallel to some lattice directions. We show that the corresponding consistency problem is NP-complete for any two (or more) different (fixed) directions when six (or more) types of atoms are involved.

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On the computational complexity of determining polyatomic structures by X-rays

On the computational complexity of determining polyatomic structures by X-rays

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri