Let A be an abelian category and P(A)be the subcategory of A consisting of projective objects.Let C be a full,additive and self-orthogonal subcategory of A with
Using the method for the classical electrostatic problems, some difficuties in modern phys-ics and engineering canbe overcome. By means of the concept of equipo
Based on the electron scattering model, the theories of electron scattering and the formulae proposed by the authors for calculating generated intensity, absorp
We prove that some holomorphic functions on the moduli space of tori have only simple zeros.Instead of computing the derivative with respect to the moduli param