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Supported in part by NSF grants and a Sloan fellowship.
Supported by an NSF postdoctoral fellowship.
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Christ, F.M., Sogge, C.D. The weak typeL 1 convergence of eigenfunction expansions for pseudodifferential operators. Invent Math 94, 421–453 (1988). https://doi.org/10.1007/BF01394331
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DOI: https://doi.org/10.1007/BF01394331