We prove a theorem on the existence of an invariant subspaces of special type for maximal J-dissipative and maximal J-symmetric operators.
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Azizov, T.Y., Iokhvidov, E.I. Invariant subspaces of maximal J-dissipative operators. Mathematical Notes of the Academy of Sciences of the USSR 12, 886–889 (1972). https://doi.org/10.1007/BF01156050
- Invariant Subspace