Spectrum and the Fixed Point Sets of Isometries. I.
Lower Bounds for Eigenfunctions on Riemannian Manifolds.
Asymptotic Expansions for the Solutions of Certain Nonlinear Parabolic Problems. I .
Bounded Harmonic Functions and Positive Ricci Curvature.
Negative Curvature and Embedded Eigenvalues.
Elliptic operators and covers of Riemannian manifolds.
G-Spaces, the Asymptotic Splitting of L2(M) into Irreducibles.
Spectral Geometry for Certain Noncompact Riemannian Manifolds.
The Differential Form Spectrum of Hyperbolic Space.
Heat Equation and the Volume of Tubes.
Lower Bounds for the Eigenvalues of Negatively Curved Manifolds.
Nodal sets of eigenfunctions on Riemannian manifolds.
Riemannian manifolds whose Laplacians have purely continuous spectrum.
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