On a Class of Operators

Semi-inner-product spaces

G. Lumer · Transactions of the American Mathematical Society · 1961 · 477 citations · Full text

Natural Sciences, Mathematics, Algebra +13

Dissipative operators in a Banach space

G. Lumer, Ralph S. Phillips · Pacific Journal of Mathematics · 1961 · 420 citations · Full text

Natural Sciences, Mathematics, Dynamical Systems +11

A condition for the selfadjointness of a linear operator

Toivo Nieminen · Annales Academiae Scientiarum Fennicae Series A I Mathematica · 1963 · 23 citations · Full text

Natural Sciences, Mechanical Engineering, Self +6