Some new conformal covariants.
Some non-linear function theoretic properties of Riemannian manifolds.
We study the appropriate versions of parabolicity stochastic completeness and related Liouville properties for a general class of operators which include the p-Laplace operator, and the non linear singular operators in non-diagonal form considered by J. Serrin and collaborators.
Some progress in conformal geometry.
Some regularity theorems in riemannian geometry
Some remarks on almost-positivity of 's
Per una classe di operatori pseudodifferenziali a caratteristiche multiple vengono date condizioni necessarie e sufficienti per la validità di stime dal basso «ottimali»
Some remarks on gradient estimates for heat kernels.
Some remarks on the heat flow for functions and forms.
Some remarks on the index theorem approach to anomalies
Some remarks on the weak maximum principle.
We obtain a maximum principle at infinity for solutions of a class of nonlinear singular elliptic differential inequalities on Riemannian manifolds under the sole geometrical assumptions of volume growth conditions. In the case of the Laplace-Beltrami operator we relate our results to stochastic completeness and parabolicity of the manifold.
Some Remarks on Transmutation, Scattering Theory, and Special Functions.
Some results on eigenfunctions on symmetric spaces and eigenspace representations.
Some spectral results for the Laplacian on line bundles over Sn.
Some topics in spectral geometry
Special invariant operators I
The aim of the first part of a series of papers is to give a description of invariant differential operators on manifolds with an almost Hermitian symmetric structure of the type which are defined on bundles associated to the reducible but undecomposable representation of the parabolic subgroup of the Lie group . One example of an operator of this type is the Penrose’s local twistor transport. In this part general theory is presented, and conformally invariant operators are studied in more...
Spectra of Compact Locally Symmetric Manifolds of Negative Curvature.
Spectra of manifolds with small handles.
Spectral analysis of non-compact manifolds using commutator methods
Spectral analysis on singular spaces
Spectral and scattering theory for symbolic potentials of order zero
Spectral Asymmetrie and Zeta Functions.