<正>In this paper, we study complete open manifolds with nonnegative Ricci curvature and injectivity radius bounded from below. We find that this kind of manifo
Collocation method is put forward to solve the semiconductor problem with heat-conduction,whose mathematical model is described by an intitial and boundary prob
<正>Let M be a hyperbolic 3-manifold with boundary. Suppose thatαandβare two separating slopes on the same component of (?)M. We shall prove that if both M[α