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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.