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Math Help - lebesgue measure

  1. #1
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    lebesgue measure

    Assume f > g two measurable function on [a,b] and
    E={(x,y) : g(x)≤y≤f(x), x ∈ [a,b]}
    Show ∫ (f-g) dm = mm E . that m is lebesgue measure.
    (limits of integration is a,b)

    help will be appreciated so much
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  2. #2
    Senior Member Shanks's Avatar
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    Hint:Fubini Theorem
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