Fedotov, Alexander; Klopp, Frédéric The complex WKB method for difference equations and Airy functions. (English) Zbl 1425.39011 SIAM J. Math. Anal. 51, No. 6, 4413-4447 (2019). MSC: 39A45 39A12 33C10 PDF BibTeX XML Cite \textit{A. Fedotov} and \textit{F. Klopp}, SIAM J. Math. Anal. 51, No. 6, 4413--4447 (2019; Zbl 1425.39011) Full Text: DOI arXiv OpenURL
Klopp, F.; Fedotov, A. A. Stark-Wannier ladders and cubic exponential sums. (English. Russian original) Zbl 1360.34174 Funct. Anal. Appl. 50, No. 3, 233-236 (2016); translation from Funkts. Anal. Prilozh. 50, No. 3, 81-85 (2016). MSC: 34L40 34L05 PDF BibTeX XML Cite \textit{F. Klopp} and \textit{A. A. Fedotov}, Funct. Anal. Appl. 50, No. 3, 233--236 (2016; Zbl 1360.34174); translation from Funkts. Anal. Prilozh. 50, No. 3, 81--85 (2016) Full Text: DOI arXiv OpenURL
Fedotov, Alexander; Klopp, Frédéric Strong resonant tunneling, level repulsion and spectral type for one-dimensional adiabatic quasi-periodic Schrödinger operators. (English) Zbl 1112.47038 Ann. Sci. Éc. Norm. Supér. (4) 38, No. 6, 889-950 (2005). Reviewer: Anatoly N. Kochubei (Kyïv) MSC: 47E05 34L40 47N50 81Q10 47A10 PDF BibTeX XML Cite \textit{A. Fedotov} and \textit{F. Klopp}, Ann. Sci. Éc. Norm. Supér. (4) 38, No. 6, 889--950 (2005; Zbl 1112.47038) Full Text: DOI Numdam Numdam EuDML OpenURL
Fedotov, Alexander; Klopp, Frédéric On the absolutely continuous spectrum of one-dimensional quasi-periodic Schrödinger operators in the adiabatic limit. (English) Zbl 1101.34069 Trans. Am. Math. Soc. 357, No. 11, 4481-4516 (2005). MSC: 34L40 34E20 34M60 47A10 47E05 81Q05 81Q10 PDF BibTeX XML Cite \textit{A. Fedotov} and \textit{F. Klopp}, Trans. Am. Math. Soc. 357, No. 11, 4481--4516 (2005; Zbl 1101.34069) Full Text: DOI OpenURL