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72 papers · 1 filter
Gauge invariance in teleparallel gravity theories: A solution to the background structure problem
Ettore Minguzzi
We deal with the problem of identifying a background structure and its perturbation in tetrad theories of gravity. Starting from a peculiar trivial principal bundle we define a met…
A remark on the numerical validation of triviality for scalar field theories using high-temperature expansions
P. Butera, M. Comi
We suggest a simple modification of the usual procedures of analysis for the high-temperature (strong-coupling or hopping-parameter) expansions of the renormalized four-point coupl…
Critical universality and hyperscaling revisited for Ising models of general spin using extended high-temperature series
P. Butera, M. Comi
We have extended through beta^{23} the high-temperature expansion of the second field derivative of the susceptibility for Ising models of general spin, with nearest-neighbor inter…
Enhanced interface repulsion from quenched hard-wall randomness
Daniela Bertacchi, Giambattista Giacomin
We consider the harmonic crystal on the d-dimensional lattice, d larger or equal to 3, that is the centered Gaussian field with covariance given by the Green function of the si…
On the growth of bounded trees
Claudio Destri, Luca Donetti
Bounded infinite graphs are defined on the basis of natural physical requirements. When specialized to trees this definition leads to a natural conjecture that the average connecti…
Molecular gas in late-type galaxies
A. Boselli, J. Lequeux, G. Gavazzi
We present CO(J=1--0) line observations of 22 low-luminosity spiral galaxies in the Virgo cluster. These data, together with 244 others available in the literature, allow us…