49G99
- : Periodic solutions for nonlinear problems with strong resonance at infinity. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 3, pp. 415-425
- : Remark on the Fredholm alternative for nonlinear operators with application to nonlinear integral equations of generalized Hammerstein type. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 13 (1972), issue 1, pp. 109-120
- : Strengthening upper bound for the number of critical levels of nonlinear functionals. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 13 (1972), issue 2, pp. 297-310
- : Upper bound for the number of eigenvalues for nonlinear operators (Preliminary communication). (English). Commentationes Mathematicae Universitatis Carolinae, vol. 13 (1972), issue 1, pp. 191-195
- : Stability of the method of least squares for finding the eigenvalues of a symmetric operator. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 4, pp. 641-655
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