共 50 条
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- [36] FRACTIONAL POWERS OF OPERATORS IN HILBERT-SPACE ACTA SCIENTIARUM MATHEMATICARUM, 1974, 36 (1-2): : 55 - 61
- [39] ON RANGES OF ADJOINT OPERATORS IN HILBERT-SPACE ACTA SCIENTIARUM MATHEMATICARUM, 1983, 46 (1-4): : 295 - 298
- [40] THE CLOSURE OF INVERTIBLE OPERATORS ON A HILBERT-SPACE ACTA SCIENTIARUM MATHEMATICARUM, 1985, 49 (1-4): : 321 - 327