In this paper, the properties of the solutions ot Boltzmann-Poisson system in three dimensions are considered. The estimates of the energies (the kinetic and th
This paper provides the complete proof of the fact that any planar cubic graph isat most slngle-bend embeddable except for the tetrabedrou. An O(n) amortized ti
A sign pattern is a matrix whose entries are from the set{+,-,0}.Associated with each sign pattern A of order n is a qualitative class of A,defined by Q(A).For