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Lower semicontinuity of positive quadratic forms. (English) Zbl 0442.47017

47B25 Linear symmetric and selfadjoint operators (unbounded)
47A55 Perturbation theory of linear operators
15A63 Quadratic and bilinear forms, inner products
Full Text: DOI
[1] Reed, Methods of Modern Mathematical Physics. I. Functional Analysis (1972) · Zbl 0242.46001
[2] DOI: 10.1007/BF01609845 · doi:10.1007/BF01609845
[3] Brezis, Maximal Monotone Operators (1973)
[4] Kato, Perturbation Theory for Linear Operators (1966) · Zbl 0148.12601
[5] Dym, Fourier Series and Integrals (1972)
[6] DOI: 10.1016/0001-8708(77)90108-6 · Zbl 0938.81568 · doi:10.1016/0001-8708(77)90108-6
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