Self-adjoint subspaces and eigenfunction expansions for ordinary differential subspaces

Introduction to Functional Analysis.

Casper Goffman, Amy E. Taylor · American Mathematical Monthly · 1959 · 1K citations

Natural Sciences, Mathematics, Functional Assessment +9

Extension theory of formally normal and symmetric subspaces

Earl A. Coddington · Memoirs of the American Mathematical Society · 1973 · 193 citations

Natural Sciences, Computer Science, Mathematics +13

Self-adjoint extensions of symmetric subspaces

Aad Dijksma, Hendrik de Snoo · Pacific Journal of Mathematics · 1974 · 151 citations · Full text

Natural Sciences, Mathematics, Differential Equations +11

Self-adjoint subspace extensions of nondensely defined symmetric operators

Earl A. Coddington · Advances in Mathematics · 1974 · 47 citations

Natural Sciences, Mathematics, Algebra +12

Self-adjointness for multi-point differential operators

John Locker · Pacific Journal of Mathematics · 1973 · 46 citations · Full text

Natural Sciences, Property Law, Differential Equations +5