BIRS Workshop Lecture Videos

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BIRS Workshop Lecture Videos

Brownian motion conditioned to have trivial signature Habermann, Karen


To motivate of why it could be interesting to study multidimensional Brownian motion conditioned to have trivial signature, we discuss results on one-dimensional Brownian motion on the time interval $ [0, 1] $ conditioned to have vanishing iterated time integrals up to order $N$. We show that, in the large $N$ limit, these processes converge weakly to the zero process, which gives rise to a polynomial decomposition for Brownian motion, and we show that the associated fluctuation processes converge in finite dimensional distributions to a collection of independent zero-mean Gaussian random variables whose variances follow a scaled semicircle.

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