TY  - JOUR
AU  - V. A. Il'in
TI  - Conditions for the convergence of spectral decompositions that correspond to self-adjoint extensions of elliptic operators. III.~Best possible local estimates of Riesz means of an arbitrary function from the class $L_2(G)$ for a self-adjoint extension of the Laplace operator
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1036
EP  - 1041
VL  - 7
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_6_a10/
LA  - ru
ID  - DE_1971_7_6_a10
ER  -