Estimates for fundamental solutions of second-order subelliptic differential operators

Christ, Michael

doi:10.1090/S0002-9939-1989-0953002-6

Estimates for fundamental solutions of second-order subelliptic differential operators
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by Michael Christ

Proc. Amer. Math. Soc. 105 (1989), 166-172

DOI: https://doi.org/10.1090/S0002-9939-1989-0953002-6

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Abstract:

A simple proof is given of pointwise estimates of C. Fefferman and A. Sánchez-Calle for the fundamental solution of a subelliptic, second-order partial differential operator with nonnegative characteristic form, based on a rescaling argument.

References

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