Behrndt, Jussi; Gesztesy, Fritz; Schmitz, Philipp; Trunk, Carsten Lower bounds for self-adjoint Sturm-Liouville operators. (English) Zbl 07748566 Proc. Am. Math. Soc. 151, No. 12, 5313-5323 (2023). MSC: 34L05 34L40 PDFBibTeX XMLCite \textit{J. Behrndt} et al., Proc. Am. Math. Soc. 151, No. 12, 5313--5323 (2023; Zbl 07748566) Full Text: DOI arXiv
Frymark, Dale; Liaw, Constanze Spectral properties of singular Sturm-Liouville operators via boundary triples and perturbation theory. (English) Zbl 07684541 J. Differ. Equations 363, 391-421 (2023). MSC: 47A55 34D15 34B20 34B24 34L10 PDFBibTeX XMLCite \textit{D. Frymark} and \textit{C. Liaw}, J. Differ. Equations 363, 391--421 (2023; Zbl 07684541) Full Text: DOI arXiv
Gestesy, Fritz; Nichols, Roger Strict domain monotonicity of the principal eigenvalue and a characterization of lower boundedness for the Friedrichs extension of four-coefficient Sturm-Liouville operators. (English) Zbl 07614114 Acta Sci. Math. 88, No. 1-2, 189-222 (2022). MSC: 34B24 34L05 34L15 47A10 47E05 PDFBibTeX XMLCite \textit{F. Gestesy} and \textit{R. Nichols}, Acta Sci. Math. 88, No. 1--2, 189--222 (2022; Zbl 07614114) Full Text: DOI arXiv
Mikhailets, Vladimir; Goriunov, Andrii; Molyboga, Volodymyr Povzner-Wienholtz-type theorems for Sturm-Liouville operators with singular coefficients. (English) Zbl 1509.34095 Complex Anal. Oper. Theory 16, No. 8, Paper No. 113, 13 p. (2022). Reviewer: Jiři Lipovský (Hradec Králové) MSC: 34L40 34B24 47B25 47E05 PDFBibTeX XMLCite \textit{V. Mikhailets} et al., Complex Anal. Oper. Theory 16, No. 8, Paper No. 113, 13 p. (2022; Zbl 1509.34095) Full Text: DOI arXiv
Fucci, Guglielmo; Gesztesy, Fritz; Kirsten, Klaus; Littlejohn, Lance L.; Nichols, Roger; Stanfill, Jonathan The Krein-von Neumann extension revisited. (English) Zbl 1526.34022 Appl. Anal. 101, No. 5, 1593-1616 (2022). Reviewer: Natalia Bondarenko (Saratov) MSC: 34B24 34B09 34C10 34L40 34B20 34B30 47A57 PDFBibTeX XMLCite \textit{G. Fucci} et al., Appl. Anal. 101, No. 5, 1593--1616 (2022; Zbl 1526.34022) Full Text: DOI arXiv
Gesztesy, Fritz; Littlejohn, Lance L.; Michael, Isaac; Pang, Michael M. H. A sequence of weighted Birman-Hardy-Rellich inequalities with logarithmic refinements. (English) Zbl 1501.26011 Integral Equations Oper. Theory 94, No. 2, Paper No. 13, 38 p. (2022). Reviewer: Georgios Psaradakis (Kastoria) MSC: 26D10 34A40 34L10 PDFBibTeX XMLCite \textit{F. Gesztesy} et al., Integral Equations Oper. Theory 94, No. 2, Paper No. 13, 38 p. (2022; Zbl 1501.26011) Full Text: DOI arXiv
Kostenko, Aleksey; Malamud, Mark; Nicolussi, Noema A Glazman-Povzner-Wienholtz theorem on graphs. (English) Zbl 1503.81035 Adv. Math. 395, Article ID 108158, 30 p. (2022). MSC: 81Q35 05C50 39A12 34B45 47B25 81Q10 PDFBibTeX XMLCite \textit{A. Kostenko} et al., Adv. Math. 395, Article ID 108158, 30 p. (2022; Zbl 1503.81035) Full Text: DOI arXiv
Gesztesy, Fritz; Pang, Michael M. H.; Stanfill, Jonathan Bessel-type operators and a refinement of Hardy’s inequality. (English) Zbl 1491.26015 Gesztesy, Fritz (ed.) et al., From operator theory to orthogonal polynomials, combinatorics, and number theory. A volume in honor of Lance Littlejohn’s 70th birthday. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 285, 143-172 (2021). MSC: 26D10 47E05 34L99 PDFBibTeX XMLCite \textit{F. Gesztesy} et al., Oper. Theory: Adv. Appl. 285, 143--172 (2021; Zbl 1491.26015) Full Text: DOI arXiv
Yang, Chen; Sun, Huaqing Friedrichs extensions of a class of singular Hamiltonian systems. (English) Zbl 07379511 J. Differ. Equations 293, 359-391 (2021). MSC: 47H06 47B25 34B05 PDFBibTeX XMLCite \textit{C. Yang} and \textit{H. Sun}, J. Differ. Equations 293, 359--391 (2021; Zbl 07379511) Full Text: DOI
Gesztesy, Fritz; Littlejohn, Lance L.; Nichols, Roger On self-adjoint boundary conditions for singular Sturm-Liouville operators bounded from below. (English) Zbl 1458.34143 J. Differ. Equations 269, No. 9, 6448-6491 (2020). Reviewer: Hubert Kalf (München) MSC: 34L40 34B09 34B24 34C10 34B20 34B30 PDFBibTeX XMLCite \textit{F. Gesztesy} et al., J. Differ. Equations 269, No. 9, 6448--6491 (2020; Zbl 1458.34143) Full Text: DOI arXiv
Brown, B. M.; Evans, W. D.; Wood, I. G. Positive self-adjoint operator extensions with applications to differential operators. (English) Zbl 07123542 Integral Equations Oper. Theory 91, No. 5, Paper No. 41, 17 p. (2019). MSC: 47A20 35J15 47A07 47B25 47F05 PDFBibTeX XMLCite \textit{B. M. Brown} et al., Integral Equations Oper. Theory 91, No. 5, Paper No. 41, 17 p. (2019; Zbl 07123542) Full Text: DOI
Clark, Stephen; Gesztesy, Fritz; Nichols, Roger Principal solutions revisited. (English) Zbl 1508.34022 Bernido, Christopher C. (ed.) et al., Stochastic and infinite dimensional analysis. Collected papers based on the presentations at the conference, Bielefeld, Germany, June 2013. Basel: Birkhäuser/Springer. Trends Math., 85-117 (2016). Reviewer: Hüseyin Tuna (Burdur) MSC: 34B20 34B24 34C10 PDFBibTeX XMLCite \textit{S. Clark} et al., in: Stochastic and infinite dimensional analysis. Collected papers based on the presentations at the conference, Bielefeld, Germany, June 2013. Basel: Birkhäuser/Springer. 85--117 (2016; Zbl 1508.34022) Full Text: DOI arXiv
Brown, B. M.; Evans, W. D. Selfadjoint and \(m\) sectorial extensions of Sturm-Liouville operators. (English) Zbl 1394.47030 Integral Equations Oper. Theory 85, No. 2, 151-166 (2016). Reviewer: Hubert Kalf (München) MSC: 47B25 47E05 34B24 34B05 PDFBibTeX XMLCite \textit{B. M. Brown} and \textit{W. D. Evans}, Integral Equations Oper. Theory 85, No. 2, 151--166 (2016; Zbl 1394.47030) Full Text: DOI arXiv
Yao, Siqin; Sun, Jiong; Zettl, Anton The Sturm-Liouville Friedrichs extension. (English) Zbl 1363.47039 Appl. Math., Praha 60, No. 3, 299-320 (2015). Reviewer: Bilender P. Allahverdiev (Isparta) MSC: 47B25 34B24 34B05 34L05 PDFBibTeX XMLCite \textit{S. Yao} et al., Appl. Math., Praha 60, No. 3, 299--320 (2015; Zbl 1363.47039) Full Text: DOI Link
Kostenko, Aleksey; Malamud, Mark Spectral theory of semibounded Schrödinger operators with \(\delta'\)-interactions. (English) Zbl 1291.81152 Ann. Henri Poincaré 15, No. 3, 501-541 (2014). Reviewer: Farruh Mukhamedov (Kuantan) MSC: 81Q10 PDFBibTeX XMLCite \textit{A. Kostenko} and \textit{M. Malamud}, Ann. Henri Poincaré 15, No. 3, 501--541 (2014; Zbl 1291.81152) Full Text: DOI arXiv
Gosse, Laurent Compressed sensing with preconditioning for sparse recovery with subsampled matrices of Slepian prolate functions. (English) Zbl 1311.42068 Ann. Univ. Ferrara, Sez. VII, Sci. Mat. 59, No. 1, 81-116 (2013). Reviewer: Manfred Tasche (Rostock) MSC: 42C10 33E10 94A12 65D05 PDFBibTeX XMLCite \textit{L. Gosse}, Ann. Univ. Ferrara, Sez. VII, Sci. Mat. 59, No. 1, 81--116 (2013; Zbl 1311.42068) Full Text: DOI HAL
Zemánek, Petr; Hasil, Petr Friedrichs extension of operators defined by even order Sturm-Liouville equations on time scales. (English) Zbl 1483.47019 Appl. Math. Comput. 218, No. 22, 10829-10842 (2012). MSC: 47A20 34N05 34B24 PDFBibTeX XMLCite \textit{P. Zemánek} and \textit{P. Hasil}, Appl. Math. Comput. 218, No. 22, 10829--10842 (2012; Zbl 1483.47019) Full Text: DOI
Fulton, C.; Langer, H. Sturm-Liouville operators with singularities and generalized Nevanlinna functions. (English) Zbl 1214.34022 Complex Anal. Oper. Theory 4, No. 2, 179-243 (2010). Reviewer: Pavel Rehak (Brno) MSC: 34B20 34B24 PDFBibTeX XMLCite \textit{C. Fulton} and \textit{H. Langer}, Complex Anal. Oper. Theory 4, No. 2, 179--243 (2010; Zbl 1214.34022) Full Text: DOI
Weir, John Correspondence of the eigenvalues of a non-self-adjoint operator to those of a self-adjoint operator. (English) Zbl 1204.34118 Mathematika 56, No. 2, 323-338 (2010). Reviewer: Rodica Luca Tudorache (Iaşi) MSC: 34L20 34L15 34B24 PDFBibTeX XMLCite \textit{J. Weir}, Mathematika 56, No. 2, 323--338 (2010; Zbl 1204.34118) Full Text: DOI arXiv
Došlý, Ondřej; Hasil, Petr Friedrichs extension of operators defined by symmetric banded matrices. (English) Zbl 1171.39004 Linear Algebra Appl. 430, No. 8-9, 1966-1975 (2009). Reviewer: Zhiming Guo (Ontario) MSC: 39A12 34B24 47B36 47B37 PDFBibTeX XMLCite \textit{O. Došlý} and \textit{P. Hasil}, Linear Algebra Appl. 430, No. 8--9, 1966--1975 (2009; Zbl 1171.39004) Full Text: DOI
Shikano, Yutaka; Hosoya, Akio Optimal covariant measurement of momentum on a half line in quantum mechanics. (English) Zbl 1152.81605 J. Math. Phys. 49, No. 5, 052104, 13 p. (2008). MSC: 81P15 81P16 PDFBibTeX XMLCite \textit{Y. Shikano} and \textit{A. Hosoya}, J. Math. Phys. 49, No. 5, 052104, 13 p. (2008; Zbl 1152.81605) Full Text: DOI arXiv
Fulton, Charles Titchmarsh-Weyl \(m\) -functions for second-order Sturm-Liouville problems with two singular endpoints. (English) Zbl 1165.34011 Math. Nachr. 281, No. 10, 1418-1475 (2008). Reviewer: Jussi Behrndt (Berlin) MSC: 34B20 34B24 34B27 34B30 34B40 34L10 34L40 33C15 35Q40 81Q05 PDFBibTeX XMLCite \textit{C. Fulton}, Math. Nachr. 281, No. 10, 1418--1475 (2008; Zbl 1165.34011) Full Text: DOI
Marletta, Marco; Tretter, Christiane Essential spectra of coupled systems of differential equations and applications in hydrodynamics. (English) Zbl 1129.47061 J. Differ. Equations 243, No. 1, 36-69 (2007). MSC: 47N20 47E05 47A10 34L05 47A55 76E99 PDFBibTeX XMLCite \textit{M. Marletta} and \textit{C. Tretter}, J. Differ. Equations 243, No. 1, 36--69 (2007; Zbl 1129.47061) Full Text: DOI
Everitt, W. N.; Kalf, H. The Bessel differential equation and the Hankel transform. (English) Zbl 1144.34013 J. Comput. Appl. Math. 208, No. 1, 3-19 (2007). Reviewer: Ching-Hua Chang (Hualien) MSC: 34B20 47E05 PDFBibTeX XMLCite \textit{W. N. Everitt} and \textit{H. Kalf}, J. Comput. Appl. Math. 208, No. 1, 3--19 (2007; Zbl 1144.34013) Full Text: DOI
Everitt, W. N.; Kalf, H.; Littlejohn, L. L.; Markett, C. Fourth-order Bessel equation: eigenpackets and a generalized Hankel transform. (English) Zbl 1200.33009 Integral Transforms Spec. Funct. 17, No. 12, 845-862 (2006). MSC: 33C10 34B05 34L05 33C45 34B30 34A25 PDFBibTeX XMLCite \textit{W. N. Everitt} et al., Integral Transforms Spec. Funct. 17, No. 12, 845--862 (2006; Zbl 1200.33009) Full Text: DOI
Gesztesy, Fritz; Yuditskii, Peter Spectral properties of a class of reflectionless Schrödinger operators. (English) Zbl 1387.34120 J. Funct. Anal. 241, No. 2, 486-527 (2006). MSC: 34L40 47A10 47E05 PDFBibTeX XMLCite \textit{F. Gesztesy} and \textit{P. Yuditskii}, J. Funct. Anal. 241, No. 2, 486--527 (2006; Zbl 1387.34120) Full Text: DOI arXiv
Ćurgus, Branko; Read, Thomas T. Discreteness of the spectrum of second-order differential operators and associated embedding theorems. (English) Zbl 1029.34070 J. Differ. Equations 184, No. 2, 526-548 (2002). Reviewer: Georgi E.Karadzhov (Sofia) MSC: 34L05 34B24 PDFBibTeX XMLCite \textit{B. Ćurgus} and \textit{T. T. Read}, J. Differ. Equations 184, No. 2, 526--548 (2002; Zbl 1029.34070) Full Text: DOI
Schmidt, Karl Michael An application of Gesztesy-Simon-Teschl oscillation theory to a problem in differential geometry. (English) Zbl 0997.53005 J. Math. Anal. Appl. 261, No. 1, 61-71 (2001). Reviewer: Ondřej Došlý (Brno) MSC: 53A10 34B24 34L15 PDFBibTeX XMLCite \textit{K. M. Schmidt}, J. Math. Anal. Appl. 261, No. 1, 61--71 (2001; Zbl 0997.53005) Full Text: DOI
Marletta, Marco; Zettl, Anton The Friedrichs extension of singular differential operators. (English) Zbl 0954.47012 J. Differ. Equations 160, No. 2, 404-421 (2000). Reviewer: W.D.Evans (Cardiff) MSC: 47A20 PDFBibTeX XMLCite \textit{M. Marletta} and \textit{A. Zettl}, J. Differ. Equations 160, No. 2, 404--421 (2000; Zbl 0954.47012) Full Text: DOI
Atkinson, F. V.; Fulton, C. T. Asymptotics of the Titchmarsh-Weyl \(m\)-coefficient for non-integrable potentials. (English) Zbl 0936.34073 Proc. R. Soc. Edinb., Sect. A, Math. 129, No. 4, 663-683 (1999). Reviewer: T.Aktosun (Fargo) MSC: 34L40 34B20 34B60 PDFBibTeX XMLCite \textit{F. V. Atkinson} and \textit{C. T. Fulton}, Proc. R. Soc. Edinb., Sect. A, Math. 129, No. 4, 663--683 (1999; Zbl 0936.34073) Full Text: DOI
Belgiorno, F. Black hole thermodynamics and spectral analysis. (English) Zbl 0927.53034 J. Math. Phys. 39, No. 9, 4608-4633 (1998). MSC: 53Z05 83C57 83C47 81T20 PDFBibTeX XMLCite \textit{F. Belgiorno}, J. Math. Phys. 39, No. 9, 4608--4633 (1998; Zbl 0927.53034) Full Text: DOI
Aktosun, Tuncay; Klaus, Martin; Van der Mee, Cornelis On the Riemann–Hilbert problem for the one-dimensional Schrödinger equation. (English) Zbl 0777.34056 J. Math. Phys. 34, No. 7, 2651-2690 (1993). MSC: 34L40 81Q40 34L25 81U40 PDFBibTeX XMLCite \textit{T. Aktosun} et al., J. Math. Phys. 34, No. 7, 2651--2690 (1993; Zbl 0777.34056) Full Text: DOI
Marletta, Marco Automatic solution of regular and singular vector Sturm-Liouville problems. (English) Zbl 0820.65050 Numer. Algorithms 4, No. 1-2, 65-99 (1993). MSC: 65L15 34B24 34L15 PDFBibTeX XMLCite \textit{M. Marletta}, Numer. Algorithms 4, No. 1--2, 65--99 (1993; Zbl 0820.65050) Full Text: DOI
Gesztesy, F.; Zhao, Z. On critical and subcritical Sturm-Liouville operators. (English) Zbl 0726.35119 J. Funct. Anal. 98, No. 2, 311-345 (1991). MSC: 35Q53 PDFBibTeX XMLCite \textit{F. Gesztesy} and \textit{Z. Zhao}, J. Funct. Anal. 98, No. 2, 311--345 (1991; Zbl 0726.35119) Full Text: DOI
Kochubej, A. N. Self-adjoint extensions of a Schrödinger operator with singular potential. (English. Russian original) Zbl 0737.34061 Sib. Math. J. 32, No. 3, 401-409 (1991); translation from Sib. Mat. Zh. 32, No. 3(187), 60-69 (1991). Reviewer: S.L.Edelstein (Rostov-na-Donu) MSC: 34L40 47B25 PDFBibTeX XMLCite \textit{A. N. Kochubej}, Sib. Math. J. 32, No. 3, 401--409 (1991; Zbl 0737.34061); translation from Sib. Mat. Zh. 32, No. 3(187), 60--69 (1991) Full Text: DOI
Mohr, Ernst Reihenentwicklungen im Weylschen Grenzkreisfall über einem halbunendlichen Intervall. (Series expansion in the Weyl limit circle case on a semiinfinite interval). (German) Zbl 0699.34030 Ann. Mat. Pura Appl., IV. Ser. 153, 27-52 (1988). Reviewer: J.Banás MSC: 34B27 34C05 34M99 PDFBibTeX XMLCite \textit{E. Mohr}, Ann. Mat. Pura Appl. (4) 153, 27--52 (1988; Zbl 0699.34030) Full Text: DOI
Brüning, Jochen; Seeley, Robert The resolvent expansion for second order regular singular operators. (English) Zbl 0625.47040 J. Funct. Anal. 73, 369-429 (1987). MSC: 47F05 47A10 35P20 35J25 35R20 58J20 47B10 PDFBibTeX XMLCite \textit{J. Brüning} and \textit{R. Seeley}, J. Funct. Anal. 73, 369--429 (1987; Zbl 0625.47040) Full Text: DOI
Atkinson, F. V.; Fulton, C. T. Asymptotics of Sturm-Liouville eigenvalues for problems on a finite interval with one limit-circle singularity. I. (English) Zbl 0584.34015 Proc. R. Soc. Edinb., Sect. A 99, 51-70 (1984). Reviewer: D.Robert MSC: 34L99 PDFBibTeX XMLCite \textit{F. V. Atkinson} and \textit{C. T. Fulton}, Proc. R. Soc. Edinb., Sect. A, Math. 99, 51--70 (1984; Zbl 0584.34015) Full Text: DOI
Brüning, Jochen Heat equation asymptotics for singular Sturm-Liouville problems. (English) Zbl 0528.34020 Math. Ann. 268, 173-196 (1984). MSC: 34L99 41A60 PDFBibTeX XMLCite \textit{J. Brüning}, Math. Ann. 268, 173--196 (1984; Zbl 0528.34020) Full Text: DOI EuDML
Mohr, Ernst Ein Beitrag zur Weylschen Theorie vom Grenzpunktfall. (German) Zbl 0527.34019 Ann. Mat. Pura Appl., IV. Ser. 132, 331-352 (1982). MSC: 34B20 PDFBibTeX XMLCite \textit{E. Mohr}, Ann. Mat. Pura Appl. (4) 132, 331--352 (1982; Zbl 0527.34019) Full Text: DOI
Mohr, Ernst Eine Bemerkung zur Weylschen Theorie vom Grenzkreis- und Grenzpunktfall. (German) Zbl 0501.34021 Ann. Mat. Pura Appl., IV. Ser. 129, 161-199 (1981). MSC: 34B20 34L99 34C05 PDFBibTeX XMLCite \textit{E. Mohr}, Ann. Mat. Pura Appl. (4) 129, 161--199 (1981; Zbl 0501.34021) Full Text: DOI
Kalf, Hubert Gauss’s theorem and the self-adjointness of Schrödinger operators. (English) Zbl 0458.35025 Ark. Mat. 18, 19-47 (1980). MSC: 35J10 26B20 47B25 PDFBibTeX XMLCite \textit{H. Kalf}, Ark. Mat. 18, 19--47 (1980; Zbl 0458.35025) Full Text: DOI
Fulton, Charles T. Singular eigenvalue problems with eigenvalue parameter contained in the boundary conditions. (English) Zbl 0458.34013 Proc. R. Soc. Edinb., Sect. A 87, 1-34 (1980). MSC: 34L99 34B20 PDFBibTeX XMLCite \textit{C. T. Fulton}, Proc. R. Soc. Edinb., Sect. A, Math. 87, 1--34 (1980; Zbl 0458.34013) Full Text: DOI
Fulton, Charles T.; Pruess, Steven Numerical methods for a singular eigenvalue problem with eigenparameter in the boundary conditions. (English) Zbl 0464.65056 J. Math. Anal. Appl. 71, 431-462 (1979). MSC: 65L15 34L99 34B30 PDFBibTeX XMLCite \textit{C. T. Fulton} and \textit{S. Pruess}, J. Math. Anal. Appl. 71, 431--462 (1979; Zbl 0464.65056) Full Text: DOI
Kwong, Man Kam A second order Dirichlet differential expression that is not bounded below. (English) Zbl 0428.34007 Proc. R. Soc. Edinb., Sect. A 83, 39-43 (1979). MSC: 34A40 PDFBibTeX XMLCite \textit{M. K. Kwong}, Proc. R. Soc. Edinb., Sect. A, Math. 83, 39--43 (1979; Zbl 0428.34007) Full Text: DOI
Everitt, W. N. An integral inequality with an application to ordinary differential operators. (English) Zbl 0407.26010 Proc. R. Soc. Edinb., Sect. A 80, 35-44 (1978). MSC: 26D10 34L99 47E05 PDFBibTeX XMLCite \textit{W. N. Everitt}, Proc. R. Soc. Edinb., Sect. A, Math. 80, 35--44 (1978; Zbl 0407.26010) Full Text: DOI
Schmincke, U.-W. On Schrödinger’s factorization method for Sturm-Liouville operators. (English) Zbl 0395.47022 Proc. R. Soc. Edinb., Sect. A 80, 67-84 (1978). MSC: 47B25 34L99 47A10 49R50 PDFBibTeX XMLCite \textit{U. W. Schmincke}, Proc. R. Soc. Edinb., Sect. A, Math. 80, 67--84 (1978; Zbl 0395.47022) Full Text: DOI
Wüst, Rainer Dirac operations with strongly singular potentials. Distinguished self- adjoint extensions constructed with a spectral gap theorem and cut-off potentials. (English) Zbl 0361.35051 Math. Z. 152, 259-271 (1977). MSC: 35P05 47B25 47A20 47F05 PDFBibTeX XMLCite \textit{R. Wüst}, Math. Z. 152, 259--271 (1977; Zbl 0361.35051) Full Text: DOI EuDML
Natterer, Frank Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke. (German) Zbl 0312.34018 Aequationes Math. 12, 207-228 (1975). MSC: 34B20 47E05 PDFBibTeX XMLCite \textit{F. Natterer}, Aequationes Math. 12, 207--228 (1975; Zbl 0312.34018) Full Text: DOI EuDML
Grubb, Gerd Properties of normal boundary problems for elliptic even-order systems. (English) Zbl 0309.35034 Ann. Sc. Norm. Super. Pisa, Cl. Sci., IV. Ser. 1(1974), 1-61 (1975). MSC: 35J55 35B45 35S15 35P20 PDFBibTeX XMLCite \textit{G. Grubb}, Ann. Sc. Norm. Super. Pisa, Cl. Sci., IV. Ser. 1, 1--61 (1975; Zbl 0309.35034) Full Text: Numdam EuDML
Natterer, Frank Das Differenzenverfahren für singuläre Rand-Eigenwertaufgaben gewöhnlicher Differentialgleichungen. (German) Zbl 0306.65050 Numer. Math. 23, 387-409 (1975). MSC: 65L10 PDFBibTeX XMLCite \textit{F. Natterer}, Numer. Math. 23, 387--409 (1975; Zbl 0306.65050) Full Text: DOI EuDML
Kalf, Hubert The quantum mechanical virial theorem and the absence of positive energy bound states of Schrödinger operators. (English) Zbl 0302.35072 Isr. J. Math. 20, 57-69 (1975). MSC: 35P05 35J10 PDFBibTeX XMLCite \textit{H. Kalf}, Isr. J. Math. 20, 57--69 (1975; Zbl 0302.35072) Full Text: DOI
Kalf, Hubert Remarks on some Dirichlet type results for semibounded Sturm-Liouville operators. (English) Zbl 0297.34019 Math. Ann. 210, 197-205 (1974). MSC: 34B20 47E05 PDFBibTeX XMLCite \textit{H. Kalf}, Math. Ann. 210, 197--205 (1974; Zbl 0297.34019) Full Text: DOI EuDML
Piepenbrink, John Nonoscillatory elliptic equations. (English) Zbl 0289.35026 J. Differ. Equations 15, 541-550 (1974). MSC: 35J15 35B05 PDFBibTeX XMLCite \textit{J. Piepenbrink}, J. Differ. Equations 15, 541--550 (1974; Zbl 0289.35026) Full Text: DOI
Schmincke, Upke-Walther Distinguished selfadjoint extensions of Dirac operators. (English) Zbl 0252.35062 Math. Z. 129, 335-349 (1972). MSC: 35R20 47F05 PDFBibTeX XMLCite \textit{U.-W. Schmincke}, Math. Z. 129, 335--349 (1972; Zbl 0252.35062) Full Text: DOI EuDML
Kalf, Hubert On the characterization of the Friedrichs extension of ordinary or elliptic differential operators with a strongly singular potential. (English) Zbl 0237.35026 J. Funct. Anal. 10, 230-250 (1972). MSC: 35J10 35P25 35J70 PDFBibTeX XMLCite \textit{H. Kalf}, J. Funct. Anal. 10, 230--250 (1972; Zbl 0237.35026) Full Text: DOI
Kalf, Hubert; Walter, Johann Strongly singular potentials and essential self-adjointness of singular elliptic operators in \(C^\infty_0(\mathbb{R}^n\setminus\{0\})\). (English) Zbl 0229.35041 J. Funct. Anal. 10, 114-130 (1972). MSC: 35J99 47F05 PDFBibTeX XMLCite \textit{H. Kalf} and \textit{J. Walter}, J. Funct. Anal. 10, 114--130 (1972; Zbl 0229.35041) Full Text: DOI
Natterer, Frank Numerische Behandlung singulärer Sturm-Liouville-Probleme. (German) Zbl 0182.49701 Numer. Math. 13, 434-447 (1969). MSC: 65L10 PDFBibTeX XMLCite \textit{F. Natterer}, Numer. Math. 13, 434--447 (1969; Zbl 0182.49701) Full Text: DOI EuDML
Dixmier, Jacques Traces sur les \(C^*\)-algèbres. (French) Zbl 0118.11303 Ann. Inst. Fourier 13, No. 1, 219-262 (1963). PDFBibTeX XMLCite \textit{J. Dixmier}, Ann. Inst. Fourier 13, No. 1, 219--262 (1963; Zbl 0118.11303) Full Text: DOI Numdam EuDML
Bazley, N. W.; Fox, David W. Lower bounds to eigenvalues using operator decompositions of the form \(B*B\). (English) Zbl 0104.33702 Arch. Ration. Mech. Anal. 10, 352-360 (1962). PDFBibTeX XMLCite \textit{N. W. Bazley} and \textit{D. W. Fox}, Arch. Ration. Mech. Anal. 10, 352--360 (1962; Zbl 0104.33702) Full Text: DOI
Wienholtz, E. Halbbeschränkte partielle Differentialoperatoren zweiter Ordnung vom elliptischen Typus. (German) Zbl 0142.37701 Math. Ann. 135, 50-80 (1958). PDFBibTeX XMLCite \textit{E. Wienholtz}, Math. Ann. 135, 50--80 (1958; Zbl 0142.37701) Full Text: DOI EuDML
Heinz, Erhard Halbbeschränktheit gewöhnlicher Differentialoperatoren höherer Ordnung. (German) Zbl 0082.07301 Math. Ann. 135, 1-49 (1958). PDFBibTeX XMLCite \textit{E. Heinz}, Math. Ann. 135, 1--49 (1958; Zbl 0082.07301) Full Text: DOI EuDML
Kramer, Vernon A. Asymptotic perturbation series. (English) Zbl 0091.28702 Trans. Am. Math. Soc. 85, 88-105 (1957). PDFBibTeX XMLCite \textit{V. A. Kramer}, Trans. Am. Math. Soc. 85, 88--105 (1957; Zbl 0091.28702) Full Text: DOI
Hartman, Philipp Perturbation of spectra and Krein extensions. (English) Zbl 0083.11302 Rend. Circ. Mat. Palermo, II. Ser. 5, 341-354 (1957). PDFBibTeX XMLCite \textit{P. Hartman}, Rend. Circ. Mat. Palermo (2) 5, 341--354 (1957; Zbl 0083.11302) Full Text: DOI
Courant, Richard Franz Rellich zum Gedächtnis. (German) Zbl 0077.00906 Math. Ann. 133, 185-190 (1957). PDFBibTeX XMLCite \textit{R. Courant}, Math. Ann. 133, 185--190 (1957; Zbl 0077.00906) Full Text: DOI EuDML
Krumhaar, Hans Zur Theorie der gewöhnlichen selbstadjungierten Differentialoperatoren gerader Ordnung. (German) Zbl 0067.06403 Math. Ann. 130, 109-136 (1955). PDFBibTeX XMLCite \textit{H. Krumhaar}, Math. Ann. 130, 109--136 (1955; Zbl 0067.06403) Full Text: DOI EuDML
Hellwig, Günter Über partielle Differentialgleichungen zweiter Ordnung von gemischtem Typus. (German) Zbl 0057.07902 Math. Z. 61, 26-46 (1954). PDFBibTeX XMLCite \textit{G. Hellwig}, Math. Z. 61, 26--46 (1954; Zbl 0057.07902) Full Text: DOI EuDML
Hellwig, Günter Anfangs- und Randwertprobleme bei partiellen Differentialgleichungen von wechselndem Typus auf den Rädern. (German) Zbl 0051.07601 Math. Z. 58, 337-357 (1953). PDFBibTeX XMLCite \textit{G. Hellwig}, Math. Z. 58, 337--357 (1953; Zbl 0051.07601) Full Text: DOI EuDML
Kato, Tosio Perturbation theory of semi-bounded operators. (English) Zbl 0050.34502 Math. Ann. 125, 435-447 (1953). PDFBibTeX XMLCite \textit{T. Kato}, Math. Ann. 125, 435--447 (1953; Zbl 0050.34502) Full Text: DOI EuDML
Kato, Tosio Notes on some inequalities for linear operators. (English) Zbl 0048.35301 Math. Ann. 125, 208-212 (1952). PDFBibTeX XMLCite \textit{T. Kato}, Math. Ann. 125, 208--212 (1952; Zbl 0048.35301) Full Text: DOI EuDML
Heinz, Erhard Beiträge zur Störungstheorie der Spektralzerlegung. (German) Zbl 0043.32603 Math. Ann. 123, 415-438 (1951). PDFBibTeX XMLCite \textit{E. Heinz}, Math. Ann. 123, 415--438 (1951; Zbl 0043.32603) Full Text: DOI EuDML