Necessary and sufficient conditions for the symmetrizability of dierential operators over innite dimensional state spaces

Artikel in diesem Heft

1. Heights and Geometric Invariant Theory
2. Integral extensions of unstable algebras over the Steenrod algebra
3. Necessary and sufficient conditions for the symmetrizability of dierential operators over innite dimensional state spaces
4. The zeta function of sl₂(ℤ)
5. Electrostatic characterization of spheres
6. A note on the construction of Hamiltonian trajectories along heteroclinic chains