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Acknowledgements
The authors wish to express gratitude to S. Yu. Dobrokhotov for useful discussions.
Funding
This work was supported in part by the Russian Foundation for Basic Research, grant 17-01-00529.
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Russian Text © The Author(s), 2019, published in Matematicheskie Zametki, 2019, Vol. 106, No. 5, pp. 793-796.
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Blagoveshchenskii, A.S., Kiselev, A.P. Bateman—Hörmander Two-Dimensional Waves with a Singularity at a Running Point. Math Notes 106, 845–848 (2019). https://doi.org/10.1134/S000143461911018X
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DOI: https://doi.org/10.1134/S000143461911018X