TY - JOUR AU - A. G. Sigalov TI - An equation of continuous descent for the quadratic form of a semi-bounded operator on the unit sphere JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1971 SP - 809 EP - 828 VL - 11 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1971_11_4_a0/ LA - ru ID - ZVMMF_1971_11_4_a0 ER -