47 Operator theory
47Axx General theory of linear operators (12 articles)
47A58 Operator approximation theory (3 articles)
- : A unified analysis of elliptic problems with various boundary conditions and their approximation. (English). Czechoslovak Mathematical Journal, vol. 70 (2020), issue 2, pp. 339-368
- : Error-estimates for the method of least squares of finding eigenvalues and eigenfunctions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 3, pp. 463-479
- : On the method of least squares of finding eigenvalues and eigenfunctions of some symmetric operators. II. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 3, pp. 449-462
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