Modern SABR Analytics by Alexandre Antonov & Michael Konikov & Michael Spector
Author:Alexandre Antonov & Michael Konikov & Michael Spector
Language: eng
Format: epub
ISBN: 9783030106560
Publisher: Springer International Publishing
(3.67)
and allows obtaining all ‘odd’ heat kernels from and all ‘even’ ones from .4
This tells little, though, how to find the important McKean’s heat kernel . We have found a new, quite elementary derivation; no special functions, no contour integrals, only some algebra and differentiation. It follows scheme where (see below) is Gaussian distribution, is obtained from by simple differentiation, as discussed above; and new steps, kernel , that solves a heat equation arising in connection with log-normal SABR model, and modifies multiplying it by function ; finally, follows as a marginal distribution from by integrating out one of two ‘horizontal’ coordinates.
We start now with Dimension one. Element of length is , distance (for it is better to take distance with sign). Laplacian (3.62) looks like . The heat equation becomes the standard parabolic one
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Biomathematics | Differential Equations |
Game Theory | Graph Theory |
Linear Programming | Probability & Statistics |
Statistics | Stochastic Modeling |
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