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Remarks on a theorem by G. Epifanio, ’’On the matrix representation of unbounded operators’’ [J. Math. Phys. 1 7 , 1688 (1976)]

1979; American Institute of Physics; Volume: 20; Issue: 8 Linguagem: Inglês

10.1063/1.524287

1527-2427

G. Epifanio, Camillo Trapanı,

Algebraic and Geometric Analysis

We give a generalization of a theorem concerning the change of basis for the matrix representation of unbounded operators defined in a scalar product space. We introduce for the proof a suitable structure which can be useful when one has to make operations with operators defined between different scalar product spaces.