V. E. Kashkakha, “On the zeros of the gradient of the solutions of second-order homogeneous elliptic equations in the plane”, Dokl. Akad. Nauk SSSR, 1971, Volume 199, Number 3,Pages <nobr>523

MATHEMATICS

On the zeros of the gradient of the solutions of second-order homogeneous elliptic equations in the plane

V. E. Kashkakha

Donetsk Computing Center of the USSR Academy of Sciences

UDC: 517.946

Presented: I. N. Vekua
Received: 27.04.1970