In this first paper of a series, we study the difference discrete variational principle in the framework of multi-parameter differential approach by regarding t
Using the standard truncated Painleve analysis, we can obtain a Backlund transformation of the (3+1)-dimensional Nizhnik Novikov-Veselov (NNV) equation and get
In this paper we study the spinor constructions of gauge fluxes and Ramond Ramond fields on noncommu-tative tori Td up to d=6. In which the spinor and conjugate