Fractional powers of coercively positive sums of operators. (English. Russian original) Zbl 0333.47010
Sov. Math., Dokl. 16, 1638-1641 (1975); translation from Dokl. Akad. Nauk SSSR 225, 1271-1274 (1975).
MSC:
47A60 | Functional calculus for linear operators |
47F05 | General theory of partial differential operators |
47B47 | Commutators, derivations, elementary operators, etc. |