Showing papers by "University of Valencia published in 1974"
14 citations
12 citations
TL;DR: In this paper, Liouville equation and projection operator techniques were used to obtain a compact equation for the rate of change of then-particle momentum distribution function to any order in the density.
Abstract: Starting from the Liouville equation and making use of projection operator techniques we obtain a compact equation for the rate of change of then-particle momentum distribution function to any order in the density. This equation is exact in the thermodynamic limit. The terms up to second order in the density are studied and expressions are given for the errors committed when one makes the usual hypothesis to derive generalized Boltzmann equations. Finally the Choh-Uhlenbeck operator is obtained under additional assumptions.
5 citations
TL;DR: These surface alterations seem to be patognomonic of the neoplasic cells of the cervix uteri and invasive carcinoma in situ, which are never seen in normal polystratified epithelium.
Abstract: Scanning electron microscopy has been used in the study of five cases of the cervix uteri: two normal cases; one case of indirect metaplasia; one case of carcinoma in situ whose colposcopic examination showed an erosio vera surrounded by leucoplasia, mosaic, base, and an area of atipic transformation zone and one case of invasive carcinoma.
4 citations
TL;DR: In this paper, the existence of the Boltzmann equation and its generalizations is studied by analysing the order of magnitude of their terms, and it is shown that the reduced distribution functions are not analytic in the density.
Abstract: The existence of the Boltzmann equation and its generalizations is studied by analysing the order of magnitude of their terms. As a consequence we conclude that the reduced distribution functions are not analytic in the density.
3 citations