Szukana fraza: [Abstract = "An investigation made on the effect of Hall currents on double\-diffusive convection of a compressible synovial \(couple\-stress\) fluid in the presence of a horizontal magnetic field through a porous layer is considered. The analysis is carried out within the framework of linear stability theory and normal mode technique. A dispersion relation governing the effects of viscoelasticity, compressibility, magnetic field and porous layer is derived."]