Formally normal ordinary differential operators

Coddington, E. A.

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We present a new approach to the question of when the commutativity of operator exponentials implies that of the operators. This is proved in the setting of bounded normal operators on a complex Hilbert space. The proofs are based on some results on similarities by Berberian and Embry as well as the celebrated Fuglede theorem.

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Marcin Bownik, John Jasper (2015)

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