Asymptotic Behavior of Heat Kernels on Spheres of Large Dimensions
Forn[greater-or-equal, slanted]2, let ([mu]x[tau],Â n)[tau][greater-or-equal, slanted]0be the distributions of the Brownian motion on the unit sphereSn[subset of]n+1starting in some pointx[set membership, variant]Sn. This paper supplements results of Saloff-Coste concerning the rate of convergence of[mu]x[tau],Â nto the uniform distributionUnonSnfor[tau]-->[infinity] depending on the dimensionn. We show that,[formula]for[tau]n:=(lnÂ n+2s)/(2n), where erf denotes the error function. Our proof depends on approximations of the measures[mu]x[tau],Â nby measures which are known explicitly via Poisson kernels onSn, and which tend, after suitable projections and dilatations, to normal distributions on forn-->[infinity]. The above result as well as some further related limit results will be derived in this paper in the slightly more general context of Jacobi-type hypergroups.
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Volume (Year): 59 (1996)
Issue (Month): 2 (November)
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