The operator equationAX−XB=C with unbounded operatorsA andB and related abstract Cauchy problems

Introduction to matrix analysis

Henri Amar · Journal of the Franklin Institute · 1960 · 2.3K citations

Natural Sciences, Mathematics, Systems Analysis +9

Functional Analysis and Semi-Groups

Richard G. Cooke · Nature · 1949 · 1.9K citations

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An Introduction to Harmonic Analysis.

Guido Weiss, Yitzhak Katznelson · American Mathematical Monthly · 1970 · 1.7K citations

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Extending a theorem of A. M. Liapunov to Hilbert space

Richard Datko · Journal of Mathematical Analysis and Applications · 1970 · 367 citations

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On the operator equation BX−XA=Q

Marvin Rosenblum · Duke Mathematical Journal · 1956 · 297 citations

Natural Sciences, Mathematics, Physics +7