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Short-time Geometry of Random Heat Kernals - Memoirs of the American Mathematical Society (Paperback)
  • Short-time Geometry of Random Heat Kernals - Memoirs of the American Mathematical Society (Paperback)
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Short-time Geometry of Random Heat Kernals - Memoirs of the American Mathematical Society (Paperback)

£49.50
Paperback Published: 30/03/1998
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This volume studies the behavior of the random heat kernel associated with the stochastic partial differential equation $du=\tfrac {1}{2} {\Delta}udt = (\sigma, \nabla u) \circ dW_t$, on some Riemannian manifold $M$. Here $\Delta$ is the Laplace-Beltrami operator, $\sigma$ is some vector field on $M$, and $\nabla$ is the gradient operator. Also, $W$ is a standard Wiener process and $\circ$ denotes Stratonovich integration. The author gives short-time expansion of this heat kernel. He finds that the dominant exponential term is classical and depends only on the Riemannian distance function. The second exponential term is a work term and also has classical meaning. There is also a third non-negligible exponential term which blows up. The author finds an expression for this third exponential term which involves a random translation of the index form and the equations of Jacobi fields. In the process, he develops a method to approximate the heat kernel to any arbitrary degree of precision.

Publisher: American Mathematical Society
ISBN: 9780821806494
Weight: 283 g

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