Langford, Jeffrey J.; Laugesen, Richard S. Maximizers beyond the hemisphere for the second Neumann eigenvalue. (English) Zbl 1518.35516 Math. Ann. 386, No. 3-4, 2255-2281 (2023). MSC: 35P15 35J25 58J50 PDFBibTeX XMLCite \textit{J. J. Langford} and \textit{R. S. Laugesen}, Math. Ann. 386, No. 3--4, 2255--2281 (2023; Zbl 1518.35516) Full Text: DOI
Langford, Jeffrey J. PDE comparison principles for Robin problems. (English) Zbl 1512.35170 Can. J. Math. 75, No. 1, 108-139 (2023). MSC: 35J05 35J25 PDFBibTeX XMLCite \textit{J. J. Langford}, Can. J. Math. 75, No. 1, 108--139 (2023; Zbl 1512.35170) Full Text: DOI arXiv
Lotoreichik, Vladimir An isoperimetric inequality for the perturbed Robin bi-Laplacian in a planar exterior domain. (English) Zbl 1504.35203 J. Differ. Equations 345, 285-313 (2023). MSC: 35P15 35J40 49K20 74K20 PDFBibTeX XMLCite \textit{V. Lotoreichik}, J. Differ. Equations 345, 285--313 (2023; Zbl 1504.35203) Full Text: DOI arXiv
Exner, Pavel; Lotoreichik, Vladimir Spectral optimization for Robin Laplacian on domains admitting parallel coordinates. (English) Zbl 1523.35235 Math. Nachr. 295, No. 6, 1163-1173 (2022). MSC: 35P15 35J25 58J50 81Q37 PDFBibTeX XMLCite \textit{P. Exner} and \textit{V. Lotoreichik}, Math. Nachr. 295, No. 6, 1163--1173 (2022; Zbl 1523.35235) Full Text: DOI arXiv
Freitas, Pedro; Laugesen, Richard Snyder Two balls maximize the third Neumann eigenvalue in hyperbolic space. (English) Zbl 1500.35216 Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 23, No. 3, 1325-1355 (2022). MSC: 35P15 35J25 55M25 35R01 PDFBibTeX XMLCite \textit{P. Freitas} and \textit{R. S. Laugesen}, Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 23, No. 3, 1325--1355 (2022; Zbl 1500.35216) Full Text: DOI arXiv
Khalile, Magda; Lotoreichik, Vladimir Spectral isoperimetric inequalities for Robin Laplacians on 2-manifolds and unbounded cones. (English) Zbl 1498.35370 J. Spectr. Theory 12, No. 2, 683-706 (2022). MSC: 35P15 35J25 35R01 58J05 58J50 PDFBibTeX XMLCite \textit{M. Khalile} and \textit{V. Lotoreichik}, J. Spectr. Theory 12, No. 2, 683--706 (2022; Zbl 1498.35370) Full Text: DOI arXiv
Chasman, Laura Mercredi; Langford, Jeffrey J. A sharp isoperimetric inequality for the second eigenvalue of the Robin plate. (English) Zbl 1498.35369 J. Spectr. Theory 12, No. 2, 617-657 (2022). MSC: 35P15 35J40 74K20 33C10 PDFBibTeX XMLCite \textit{L. M. Chasman} and \textit{J. J. Langford}, J. Spectr. Theory 12, No. 2, 617--657 (2022; Zbl 1498.35369) Full Text: DOI arXiv
Kachmar, Ayman; Lotoreichik, Vladimir On the isoperimetric inequality for the magnetic Robin Laplacian with negative boundary parameter. (English) Zbl 1487.35260 J. Geom. Anal. 32, No. 6, Paper No. 182, 20 p. (2022); correction ibid. 32, No. 9, Paper No. 237, 2 p. (2022). MSC: 35P15 35J25 81Q10 PDFBibTeX XMLCite \textit{A. Kachmar} and \textit{V. Lotoreichik}, J. Geom. Anal. 32, No. 6, Paper No. 182, 20 p. (2022; Zbl 1487.35260) Full Text: DOI arXiv
Buoso, Davide; Kennedy, James B. The Bilaplacian with Robin boundary conditions. (English) Zbl 1481.35162 SIAM J. Math. Anal. 54, No. 1, 36-78 (2022). Reviewer: Thomas Ernst (Uppsala) MSC: 35J40 35J91 35P15 PDFBibTeX XMLCite \textit{D. Buoso} and \textit{J. B. Kennedy}, SIAM J. Math. Anal. 54, No. 1, 36--78 (2022; Zbl 1481.35162) Full Text: DOI arXiv
Girouard, Alexandre; Laugesen, R. S. Robin spectrum: two disks maximize the third eigenvalue. (English) Zbl 1482.35144 Indiana Univ. Math. J. 70, No. 6, 2711-2742 (2021). MSC: 35P15 35J25 30C70 74K15 PDFBibTeX XMLCite \textit{A. Girouard} and \textit{R. S. Laugesen}, Indiana Univ. Math. J. 70, No. 6, 2711--2742 (2021; Zbl 1482.35144) Full Text: DOI arXiv
Girouard, Alexandre; Henrot, Antoine; Lagacé, Jean From Steklov to Neumann via homogenisation. (English) Zbl 1458.35040 Arch. Ration. Mech. Anal. 239, No. 2, 981-1023 (2021). Reviewer: Adrian Muntean (Karlstad) MSC: 35B27 35P05 35J25 PDFBibTeX XMLCite \textit{A. Girouard} et al., Arch. Ration. Mech. Anal. 239, No. 2, 981--1023 (2021; Zbl 1458.35040) Full Text: DOI arXiv
Laugesen, Richard S. The Robin Laplacian – spectral conjectures, rectangular theorems. (English) Zbl 1444.35033 J. Math. Phys. 60, No. 12, 121507, 31 p. (2019). Reviewer: Andrey Zahariev (Plovdiv) MSC: 35J05 35J25 35P15 PDFBibTeX XMLCite \textit{R. S. Laugesen}, J. Math. Phys. 60, No. 12, 121507, 31 p. (2019; Zbl 1444.35033) Full Text: DOI arXiv