HIGH FREQUENCY LIMIT OF THE HELMHOLTZ EQUATION. II. SOURCE ON A GENERAL SMOOTH MANIFOLD

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ACKNOWLEDGEMENTS

The authors wish to thank J.D. Benamou for suggesting the present problem, and for many fruitful discussions. Also, the present work was supported by the TMR project `Conservation Laws’ of E.U.:HCL ERBFMRXCT 960033 and by the TMR project “Asymptotic Methods in Kinetic Theory” of E.U.:ERBFMBXCT 970157. The first author wishes to thank Professor S. Müller for his invitation in the Max-Planck Institut für Mathematik in den Naturwissenschaften (Leipzig), where part of this work was done.