Within a transport model, we study effects of the momentum dependence nuclear symmetry potential on pion observables in central Sn + collisions at 270 MeV/nucleon. To this end, quantity $U_{sym}^{\infty}(\rho_{0})$, i.e., value saturation density $\rho_{0}$ and infinitely large nucleon momentum, is used to characterise potential. It shown that with certain $L$ (i.e., slope energy $\rho_{0}$) ch...

So far, quantum properties of N = 1/2 nonanticommutative (NAC) super Yang– Mills theories have been investigated in the WZ gauge. The gauge independence of the results requires assuming that at the quantum level supergauge invariance is not broken by nonanticommutative geometry. In this paper we use an alternative approach which allows studying these theories in a manifestly gauge independent s...

Astract We study here the ring QSn of Quasi-Symmetric Functions in the variables x1, x2, . . . , xn. F. Bergeron and C. Reutenauer [4] formulated a number of conjectures about this ring, in particular they conjectured that it is free over the ring Λn of symmetric functions in x1, x2, . . . , xn. We present here an algorithm that recursively constructs a Λn-module basis for QSn thereby proving o...

We introduce a new subclass of Allen's interval algebra we call \ORD-Horn subclass," which is a strict super-set of the \pointisable subclass." We prove that reasoning in the ORD-Horn subclass is a polynomial-time problem and show that the path-consistency method is suucient for deciding satissability. Further, using an extensive machine-generated case analysis, we show that the ORD-Horn subcla...