NETMaths

Is this true?

Pointwise convergence implies convergence of the integrals

No — it is false.

The counterexample

on [0,1]

pointwise but always. Domination or monotonicity is essential.

The kind of mistake this is

Hypothesis dropped

A theorem applied without checking one of its preconditions.

Drill statements like this

Others that fail the same way

From Lebesgue Measure and IntegrationLebesgue integral, MCT, DCT, Fatou

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