in this paper, the exp-function method, with the aid of a symbolic computation system such as maple, is applied to the (2+1) -dimensional calogero bogoyavlanskii schiff equation. exact and explicit generalized solitary solutions are obtained in more general forms. the free parameters can be determined by initial or boundary conditions. the method is straightforward and concise, and its applicat...

in this paper, we investigate some problems which can be reduced to the goursat problem for afourth order equation. some results and theorems are given concerning the existence and uniqence for thesolution of the suggested problem.

this study aims to study the effect of elimination of government intervention and liberalizationin meat market in rural area in iran on consumer welfare with time series data for 1981-2007.an alternative partial equilibrium model was developed to examine the welfare effect of meattrade liberalization. result show that on producer side, government budget (subsidy onproduction), foreign exchange ...