Introductory statement

Papers on semiclassical approximations

• Kiev conference presentation, 1995
• Spectral Oscillations, Periodic Orbits, and Scaling, published with slight revisions as J. Phys. A 35, 4049-4066 (2002)
• Naples conference presentation, 2001 (summary of "Spectral Oscillations ..." plus comments on the relation with vacuum energy), Nucl. Phys. B (Proc. Suppl.) 104, 161-164 (2002)

See also Eigenfunction expansions and Vacuum energy.