Duong, Anh Tuan; Nguyen, Van Hoang On the lowest eigenvalue of the fractional Laplacian for the intersection of two domains. (English) Zbl 1526.35250 Bull. Aust. Math. Soc. 108, No. 2, 290-297 (2023). MSC: 35P15 35R11 47F05 PDFBibTeX XMLCite \textit{A. T. Duong} and \textit{V. H. Nguyen}, Bull. Aust. Math. Soc. 108, No. 2, 290--297 (2023; Zbl 1526.35250) Full Text: DOI
Kurata, Kazuhiro On the ratio of the first two eigenvalues of perturbed harmonic oscillators. (English) Zbl 0874.35080 J. Math. Anal. Appl. 204, No. 1, 227-235 (1996). Reviewer: J.Hersch (Zürich) MSC: 35P15 35J10 PDFBibTeX XMLCite \textit{K. Kurata}, J. Math. Anal. Appl. 204, No. 1, 227--235 (1996; Zbl 0874.35080) Full Text: DOI
Lavine, Richard The eigenvalue gap for one-dimensional convex potentials. (English) Zbl 0805.34080 Proc. Am. Math. Soc. 121, No. 3, 815-821 (1994). MSC: 34L40 34L15 PDFBibTeX XMLCite \textit{R. Lavine}, Proc. Am. Math. Soc. 121, No. 3, 815--821 (1994; Zbl 0805.34080) Full Text: DOI
Sjöstrand, Johannes Potential wells in high dimensions. II: More about the one well case. (English) Zbl 0770.35051 Ann. Inst. Henri Poincaré, Phys. Théor. 58, No. 1, 43-53 (1993). Reviewer: B.Helffer (Paris) MSC: 35P15 35P20 35J10 81V70 PDFBibTeX XMLCite \textit{J. Sjöstrand}, Ann. Inst. Henri Poincaré, Phys. Théor. 58, No. 1, 43--53 (1993; Zbl 0770.35051) Full Text: Numdam EuDML
Kirsch, Werner; Simon, Barry Comparison theorems for the gap of Schrödinger operators. (English) Zbl 0661.35062 J. Funct. Anal. 75, 396-410 (1987). Reviewer: C.Zuily MSC: 35P15 35J10 35Q99 PDFBibTeX XMLCite \textit{W. Kirsch} and \textit{B. Simon}, J. Funct. Anal. 75, 396--410 (1987; Zbl 0661.35062) Full Text: DOI
Lieb, Elliott H. On the lowest eigenvalue of the Laplacian for the intersection of two domains. (English) Zbl 0538.35058 Invent. Math. 74, 441-448 (1983). Reviewer: J.Voigt MSC: 35P15 35J05 PDFBibTeX XMLCite \textit{E. H. Lieb}, Invent. Math. 74, 441--448 (1983; Zbl 0538.35058) Full Text: DOI EuDML
Isaacson, D.; Isaacson, E. L.; Marchesin, D.; Paes-Leme, P. J. Numerical analysis of the spectral properties of coupled oscillator Schrödinger operators. II. Two-coupled anharmonic oscillators. (English) Zbl 0519.65064 SIAM J. Numer. Anal. 19, 126-141 (1982). MSC: 65N25 81Q05 35P15 35J10 PDFBibTeX XMLCite \textit{D. Isaacson} et al., SIAM J. Numer. Anal. 19, 126--141 (1982; Zbl 0519.65064) Full Text: DOI