Abstract
This survey is concerned with a general strategy, based on Hankel transforms and special functions decompositions, to prove weak dispersive estimates for a class of PDE's. Inspired by [2], we show how to adapt the method to some scaling critical dispersive models, as the Dirac-Coulomb equation and the fractional Schr¨odinger and Dirac equation in Aharonov-Bohm field.
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Acknowledgements
The authors are grateful to Kenji Nakanishi for providing several useful comments and suggestions. The first author is partially supported by the University of Padova STARS project “Linear and Nonlinear Problems for the Dirac Equation” (LANPDE).
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Cacciafesta, F., Fanelli, L. (2021). Hankel transforms and weak dispersion. In: de Gier, J., Praeger, C.E., Tao, T. (eds) 2019-20 MATRIX Annals. MATRIX Book Series, vol 4. Springer, Cham. https://doi.org/10.1007/978-3-030-62497-2_62
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