Abstract
We establish sharp L 2-Sobolev estimates for classes of pseudodifferential operators with singular symbols [Guillemin and Uhlmann (Duke Math J 48:251–267, 1981), Melrose and Uhlmann (Commun Pure Appl Math 32:483–519, 1979)] whose non-pseudodifferential (Fourier integral operator) parts exhibit two-sided fold singularities. The operators considered include both singular integral operators along curves in \({\mathbb R^2}\) with simple inflection points and normal operators arising in linearized seismic imaging in the presence of fold caustics [Felea (Comm PDE 30:1717–1740, 2005), Felea and Greenleaf (Comm PDE 33:45–77, 2008), Nolan (SIAM J Appl Math 61:659–672, 2000)].
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A. Greenleaf was partially supported by NSF grants DMS-0138167 and DMS-0551894.
M. Pramanik was partially supported by an NSERC Discovery grant.
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Felea, R., Greenleaf, A. & Pramanik, M. An FIO calculus for marine seismic imaging, II: Sobolev estimates. Math. Ann. 352, 293–337 (2012). https://doi.org/10.1007/s00208-011-0644-5
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DOI: https://doi.org/10.1007/s00208-011-0644-5