From 6972a481bb12c8fbb7bcd6fe78c525f50c584d4e Mon Sep 17 00:00:00 2001 From: Josia Pietsch Date: Wed, 12 Jul 2023 15:27:39 +0200 Subject: [PATCH] small changes --- inputs/lecture_07.tex | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/inputs/lecture_07.tex b/inputs/lecture_07.tex index d18cde4..34a0d0b 100644 --- a/inputs/lecture_07.tex +++ b/inputs/lecture_07.tex @@ -43,8 +43,8 @@ For the proof we'll need a slight generalization of \autoref{thm2}: By \autoref{thm4} it follows that $\sum_{n \ge 1} Y_n < \infty$ almost surely. Let $A_n \coloneqq \{\omega : |X_n(\omega)| > C\}$. - Since the first series $\sum_{n \ge 1} \bP(A_n) < \infty$, - by Borel-Cantelli, $\bP[\text{infinitely many $A_n$ occur}] = 0$. + Since $\sum_{n \ge 1} \bP(A_n) < \infty$ by assumption, + Borel-Cantelli yields $\bP[\text{infinitely many $A_n$ occur}] = 0$. For the proof of (b), suppose $\sum_{n\ge 1} X_n(\omega) < \infty$