Table of Content

26 June 1983, Volume 3 Issue 2 Previous Issue    Next Issue

For Selected:

View Abstracts

Download Citations EndNote Reference Manager ProCite BibTeX RefWorks

Toggle Thumbnails

Select

ON OSCILLATIONS OF PERTURBED SECOND ORDER DIFFERENTIAL EQUATION H. El-Owaidy, A. A. S. Zagrout Acta mathematica scientia,Series A. 1983, 3 (2):  223-226.  Abstract ( 55 )   RICH HTML PDF (230KB) ( 20 )   Save A perturbed second order linear differential eqtuation is considered. A criteria concerning the oscillatory behaviour of solutions of the perturbed equation based on the perturbing function and the solutions of the associated unperturbed equation is given. Related Articles | Metrics

Select

THE NEW BOUNDARY LAYER EQUATION OF NON-NEWTONIAN FLUID FLOWS Acta mathematica scientia,Series A. 1983, 3 (2):  227-230.  Abstract ( 55 )   RICH HTML PDF (208KB) ( 16 )   Save The concept of a Boundary Layer, as a region adjacent to a solid boundary in which vorticity varies rapidly as a result of viscous convection and diffusion,outside of which the vorticity is zero, was introduced by prandlt, Some authors have made attempts to extend this concept to the flow of Non-Newtonian fluids. Related Articles | Metrics

Select

STUDY OF THE GLOBAL SOLUTIONS FOR A NONLINEAR HYPERBOLIC SYSTEM Acta mathematica scientia,Series A. 1983, 3 (2):  231-239.  Abstract ( 49 )   RICH HTML PDF (473KB) ( 22 )   Save We shall compare the solution of the Caucky problem ut+(v-1)x=0 vt-ux=0 (1.1) (u,v)(0,x)=(u0(x),v0(x)) (1.2) with the solution of the corresponding Riemann problem (1.1) with the initial data (u,v)(0,x)=(u-,v-) for x<0 (u+,v+) for x>0 (1.2)' in the whole t>0 half plane.The system of equations (1.1) is the mathematical modol for isentropic gas dynamics with adiabatic exponent x=1 Here v is tlie specific volume v=(1)/ρ,ρ is the density and u is the speed of the gas (u∓,v∓)=limx→∓∞(u0(x),v0(x)). Related Articles | Metrics