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Fundamental solutions and geometry of the sum of squares of vector fields

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  1. Department of Mathematics, Massachusetts Institute of Technology, 02138, Cambridge, MA, USA

    Antonio Sánchez-Calle

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  1. Antonio Sánchez-Calle
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Sánchez-Calle, A. Fundamental solutions and geometry of the sum of squares of vector fields. Invent Math 78, 143–160 (1984). https://doi.org/10.1007/BF01388721

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