Characteristic boundary-value problem for a third-order equation with pseudo-parabolic operator and with shifted arguments of desired function

Characteristic boundary-value problem for a system of first-order partial differential equations with shifted arguments of the desired function

“…The differential equations, both ordinary and partial, whose arguments have some shift were studied in a few papers (e.g., [1][2][3][4][5][6][7][8][9][10]). Various authors call such equations functional differential and with delayed (or deviating) argument.…”

“…Various authors call such equations functional differential and with delayed (or deviating) argument. In this paper the variant of shift from [9,10] is for the first time applied to a system of partial differential equations of the first order.…”