It is established that a PT -symmetric elliptic quadratic differential operator with real spectrum is similar to a self-adjoint operator precisely when the associated fundamental matrix has no Jordan blocks.
Quadratic PT -symmetric operators with real spectrum and similarity to self-adjoint operators
CALICETI, EMANUELA;GRAFFI, SANDRO;
2012
Abstract
It is established that a PT -symmetric elliptic quadratic differential operator with real spectrum is similar to a self-adjoint operator precisely when the associated fundamental matrix has no Jordan blocks.File in questo prodotto:
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