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KRM

Estimates of solutions of linear neutron transport equation at large time and spectral singularities

The spectral analysis of a dissipative
linear transport operator with a polynomial collision integral by the Szőkefalvi-Nagy - Foiaş functional
model is given. An exact estimate for the remainder in the asymptotic of the corresponding evolution semigroup is proved in the isotropic case. In the general case, it is shown that the operator has at most finitely many eigenvalues and spectral singularities and an absolutely continuous essential spectrum. An upper estimate for the remainder is established.

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