Positive measurable numerical function
Set
context | ⟨X,ΣX⟩∈MeasurableSpace(X) |
postulate | f∈M+ |
context | f∈Measurable(X,¯R) |
x∈X |
postulate | f(x)≥0 |
Discussion
For the definition of the integral, it's crucial to know that for every f∈M+, there is a sequence un with elements in the step functions T+, with un↑f.