| Line 4: | Line 4: | ||
Example 1: | Example 1: | ||
| − | <math>f_{n}(x)=1 if x=\frac{1}{n}, 0 otherwise</math> | + | |
| + | For <math>n</math> odds, <math>f_{n}(x)=1</math> if <math>x=\frac{1}{n}</math>, <math>0</math> otherwise. | ||
| + | |||
| + | For <math>n</math> even, <math>f_{n}(x)=3</math> if <math>x=\frac{1}{n}</math>, <math>0</math> otherwise. | ||
Revision as of 11:00, 22 July 2008
By Fatou's Lemma, we get the upper bound is 1 and since all the functions $ f_{n}\frac{}{} $ are positive, we get the lower bound is 0. This is as good as it get. Examples:
Let $ \Omega=[0,1]\frac{}{} $, the $ \sigma- $algebra is the power set and counting measure.
Example 1:
For $ n $ odds, $ f_{n}(x)=1 $ if $ x=\frac{1}{n} $, $ 0 $ otherwise.
For $ n $ even, $ f_{n}(x)=3 $ if $ x=\frac{1}{n} $, $ 0 $ otherwise.
