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Zooming-in on a Lévy process: failure to observe threshold exceedance over a dense grid

Zooming-in on a Lévy process: failure to observe threshold exceedance over a dense grid

For a Lévy process $X$ on a finite time interval consider the probability that it exceeds some fixed threshold $x>0$ while staying below $x$ at the points of a regular grid. We establish exact asymptotic behavior of this probability as the number of grid points tends to infinity. We assume …