Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
Those pesky students.... I'd forgotten about them :)

You know, sometimes I hear them in the corridors....

$E(X_t|F_s) = X_s,\quad t > s$

by martingale on Sat Apr 4th, 2009 at 06:12:57 AM EST
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