Interpolation (Levy-Ciesielski construction)
Cameron-Martin space eigenfunctions
White noise
Limit of Random walk
Hyperreals construction
see “A Non-standard Construction of Multi-Dimensional Brownian Motions and Option Pricing””.
Heat equation
The solves the heat equation with initial data
in domain
. So conversely by starting with the heat semigroup, we construct the Markov semigroup.