
Keywords: معادلات دیفرانسیل تفاوت; 35K55; 35L65; 35Q20; 35R10; 39A; 76D; Riemann-Burgers type equations; Fluid mechanics; Quasilinear conservation law; Cauchy-Gelfand problem; Difference-differential equations; Vanishing viscosity method; Shock waves;