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Homework Statement
Suppose that if k is a measurable function and {x : k(x) > 0} has a positive measure, then {x : k(x) >= p} has positive measure for some p > 0
Homework Equations
Lebesgue measure
The Attempt at a Solution
What is positive measure? is it just another word for measurable? Can I have some hint on how to attack this problem?
Thank you.