On Ranges of Lyapunov Transformations.
Technical summary rept.,
WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTER
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The range of the Lyapunov transformation L sub AH AH HA, where A is an n x n matrix and H is an n x n hermitian matrix, is discussed. The Stein-Pfeffer theorem is proved and extended in several directions. The proofs involve the idea of a controllability subspace. Author
- Theoretical Mathematics