E. V. Radkevich, “The smoothness of solutions of the first boundary value problem for second order differential equations with a non-negative characteristic form”, Uspekhi Mat. Nauk, 1969, Volume 24, Issue 3(147),Pages <nobr>233

In the Moscow Mathematical Society
Communications of the Moscow Mathematical Society

The smoothness of solutions of the first boundary value problem for second order differential equations with a non-negative characteristic form

E. V. Radkevich

Received: 05.09.1968