in this research ideal magnetohydrodynamics equations (mhd) has been solved in a channel of quasi one dimensional plasma flow. magnetohydrodynamics equations, including continuity, momentum, energy and induced magnetic field equations are with the respect of the gauss magnetic condition. the implemented numerical solution is based on harten, lax, vanleer (hlld) discontinuities solution methods....

It is known that the filed product of two quasi-antiorders need not to be a quasi-antiorder. After some preparations, we give some sufficient conditions in order that the filed product of two quasi-antiorder relations on the same set is a quasi-antiorder again. 2000Mathematics Subject Classification: Primary 03F65, Secondary 04A05, 08A02