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Penalizing fractional Brownian motion for being negative
Frank Aurzada, Micha Buck, Martin Kilian · 2019-07-18 · via math.PR updates on arXiv.org

We study a modification of the fractional analogue of the Brownian meander, which is Brownian motion conditioned to be positive on the time interval ${[0,1]}$. More precisely, we determine the weak limit of a fractional Brownian motion which is penalized -- instead of being killed -- when leaving the positive half-axis. In the Brownian case, we give a representation of the limiting process in terms of an explicit SDE and compare it to the SDE fulfilled by the Brownian meander.

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