A new variation of the coloring problem, mu-coloring, is defined in this paper. A coloring of a graph G = (V,E) is a function f: V -> N such that f(v) is different from f(w) if v is adjacent to w. Given a graph G = (V,E) ...

We deal with some generalizations of the graph coloring problem on classes of perfect graphs. Namely we consider the μ-coloring problem (upper bounds for the color on each vertex), the precoloring extension problem (a ...

The characterization of the Corriedale ram fleece was evaluated in the present investigation. The rams were imported from Uruguay and they were given to some families in several cantons of the province of Chimborazo. A ...

We calculate the production of J/ψ mesons by neutrino-nucleon collisions in fixed target experiments. Soft color, often referred to as color evaporation effects, enhances production cross sections due to the contribution ...

The platinum-platinum attraction and the spectroscopic properties of [Pt3(μ-CO)3(CO)3]n-2 (n = 3-5) were studied at the PBE level. Theoretical calculations are in agreement with experimental geometries. The absorption ...

We implement a cutoff-independent regularization of four-fermion interactions to calculate the color-superconducting gap parameter in quark matter. The traditional cutoff regularization has difficulties for chemical ...

Most of the gerberas presents very short postharvest life, mainly due to the stem bending caused in most cases, by the blockage of the xylem vessels by microorganisms. Many conservation techniques have been employed in an ...