We use martingale methods to give Bismut type derivative formulas for differentials and co-differentials of heat semigroups on forms, and more generally for sections of vector bundles. The formulas are mainly in terms of Weitzenbo ck curvature terms; in most cases derivatives of the curvature are no
Formulae for the Derivatives of Heat Semigroups
โ Scribed by K.D. Elworthy; X.M. Li
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 901 KB
- Volume
- 125
- Category
- Article
- ISSN
- 0022-1236
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โฆ Synopsis
Formulae for the derivatives of solutions of diffusion equations are derived which clearly exhibit, and allow estimation of, the equations' smoothing properties. These also give formulae for the logarithmic gradient of the corresponding heat kernels, extending and giving a very elementary proof of Bismut's well known formula. Corresponding formulae are derived for solutions of heat equations for differential forms and their exterior derivatives. C 1994 Academic Press, Inc.
๐ SIMILAR VOLUMES
## Abstract The notion of semigroups of Lipschitz operators associated with abstract quasilinear evolution equations is introduced and a product formula for such semigroups is established. The product formula obtained in the paper is applied to the solvability of the Cauchy problem for a first orde