Abstract
We use the notion of triples D+ → H → D− of Hilbert spaces to develop an analog of the Friedrichs extension procedure for a class of nonsemibounded operator matrices. In addition, we suggest a general approach (stated in the same terms) to the construction of variational principles for the eigenvalues of such matrices.
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Original Russian Text © A. A. Vladimirov, 2017, published in Matematicheskie Zametki, 2017, Vol. 101, No. 4, pp. 516–530.
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Vladimirov, A.A. Representation theorems and variational principles for self-adjoint operator matrices. Math Notes 101, 619–630 (2017). https://doi.org/10.1134/S0001434617030208
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DOI: https://doi.org/10.1134/S0001434617030208