extinguish
发表于 2025-3-28 18:08:08
Self-adjoint extensions of symmetric operators,udies was the fact that λ — . was continuously invertible for some λ ∈ ℝ; however, this is not always the case. In this chapter we develop the ., which completely answers this question. Moreover, we shall prove certain theorems about the spectra of all self-adjoint extensions of a symmetric operator.
Precursor
发表于 2025-3-28 22:09:02
Textbook 1980 few proofs have been simplified, some additional exercises have been included, and a small number of new results has been added (e.g., Theorem 11.11 and Theorem 11.23). In addition a great number of minor errors has been corrected. Frankfurt, January 1980 J. Weidmann vii Preface to the German editi
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不可知论
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骚动
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savage
发表于 2025-3-29 15:40:35
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