In this paper I construct a parametrix for the hypoelliptic diffusion equations (J/Jt - L u = 0, where L = San=lga2 and where the ga are vector fields which satisfy the property that they, together with all of the commutators [ga, gb] for cl < b, are at each point linearly independent and span the tangent space.

Original languageEnglish (US)
Pages (from-to)191-215
Number of pages25
JournalTransactions of the American Mathematical Society
Issue number1
StatePublished - Jul 1986

ASJC Scopus subject areas

  • General Mathematics
  • Applied Mathematics


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