It is well known that every l∞ linear approximation problem can be reduced to a linear program. In this paper we show that conversely every linear program can be reduced to an l∞ linear approximation problem. Now we recall relevent definitions. An affine function of variables x1, . . . , xn is b0 + c1x1 + · · · + cnxn where b0, ci are given numbers. A linear constraint is any of the following c...

in this paper, the magnetohydrodynamic (mhd) boundary layer flow over a nonlinear porous stretching sheet is investigated by employing the homotopy perturbation transform method (hptm) and the pade´ approximation. the numerical solution of the governing non-linear problem is developed. comparison of the present solution is made with the existing solution and excellent agreement is noted. graphi...

single-valence electron atoms are an important class of atoms. their oscillator strengths are their important properties. knowing the oscillator strengths one can easity calculate the transition probabilities of the spectral lines and hence the lifetimes of energy levels of most atoms. the oscillator strengths of the spectral lines of most atoms are not knoen with sufficient accuracy due to the...