Elliptic operators play a central role in the analysis of partial differential equations, underpinning a wide range of phenomena from quantum mechanics to heat conduction. In particular, the study of ...
SIAM Journal on Numerical Analysis, Vol. 44, No. 2 (2006), pp. 865-878 (14 pages) Robust quasi-relative Galerkin discretization error estimates are derived for the ...
Proceedings of the American Mathematical Society, Vol. 134, No. 5 (May, 2006), pp. 1425-1434 (10 pages) For Schrödinger operators with nonnegative single-well potentials ratios of eigenvalues are ...
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