Suppose f is integrable on [a,b], show |f| is integrable on [a,b]; I know I have to show Sp|f|-sp|f|<=Spf-spf But I'm stuck from there
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Originally Posted by calculuskid1 Suppose f is integrable on [a,b], show |f| is integrable on [a,b]; I know I have to show Sp|f|-sp|f|<=Spf-spf But I'm stuck from there The usual way goes something like this. Define two new functions: We see that so show each of those is integrable.
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