Question: Let . ;F/ be an event space, A1;A2; : : : 2 F and A D ! 2 W ! 2 An for infinitely many
Let . ;F/ be an event space, A1;A2; : : : 2 F and A D ¹! 2 W ! 2 An for infinitely many nº:
Show that
(a) A D T
N1 S
nN An,
(b) 1A D lim supn!1 1An.
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