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20022009
most citedPLUTO: a Numerical Code for Computational Astrophysics

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math-ph2004

Constant connections, quantum holonomies and the Goldman bracket

J. E. Nelson, R. F. Picken

In the context of (2+1)--dimensional quantum gravity with negative cosmological constant and topology R x T^2, constant matrix--valued connections generate a q--deformed representa…

math-ph20046 cited

Second variational derivative of gauge-natural invariant Lagrangians and conservation laws

M. Francaviglia, M. Palese, E. Winterroth

We consider the second variational derivative of a given gauge-natural invariant Lagrangian taken with respect to (prolongations of) vertical parts of gauge-natural lifts of infini…

gr-qc2004

Some Applications of the ADM Formalism

J. E. Nelson

The ADM Formalism is discussed in the context of 2+1--dimensional gravity, uniting two areas of relativity theory in which Stanley Deser has been particularly active. For spacetime…

cs.LO2004

A Sequent Calculus and a Theorem Prover for Standard Conditional Logics

Nicola Olivetti, Gian Luca Pozzato, Camilla Schwind

In this paper we present a cut-free sequent calculus, called SeqS, for some standard conditional logics, namely CK, CK+ID, CK+MP and CK+MP+ID. The calculus uses labels and transiti…

nlin.CD2004234 cited

Multifractal statistics of Lagrangian velocity and acceleration in turbulence

L. Biferale, G. Boffetta, A. Celani +3

The statistical properties of velocity and acceleration fields along the trajectories of fluid particles transported by a fully developed turbulent flow are investigated by means o…

cond-mat.mtrl-sci20041 cited

Analytical Hartree-Fock gradients with respect to the cell parameter for systems periodic in three dimensions

K. Doll, R. Dovesi, R. Orlando

Analytical Hartree-Fock gradients with respect to the cell parameter have been implemented in the electronic structure code CRYSTAL, for the case of three-dimensional periodicity.…