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Showing 2003 · math-phShow all
3 papers · 2 filters
math-ph2003
Interpolating Greedy and Reluctant Algorithms
P. Contucci, C. Giardina', C. Giberti +2
In a standard NP-complete optimization problem we introduce an interpolating algorithm between the quick decrease along the gradient (greedy dynamics) and a slow decrease close to…
math-ph2003★ 2 cited
Localization in infinite billiards: a comparison between quantum and classical ergodicity
Sandro Graffi, Marco Lenci
Consider the non-compact billiard in the first quandrant bounded by the positive -semiaxis, the positive -semiaxis and the graph of , . Althoug…
math-ph2003★ 2 cited
Path integral representations for the spin-pinned quantum XXZ chain
Oscar Bolina, Pierluigi Contucci, Bruno Nachtergaele
Two discrete path integral formulations for the ground state of a spin-pinned quantum anisotropic XXZ Heisenberg chain are introduced. Their properties are discussed and two recurs…