Linked from
The 17 pages that link to Lp space, each with the reason it gives.
Hölder's inequalityNarrower topic: Hölder bounds pairings between functions in conjugate Lᵖ spaces.
Measure spaceRelated: Its definition depends on integrating powers over a measure space.
Minkowski inequalityNarrower topic: Minkowski proves that the Lp expression is a norm for p ≥ 1.
Approximation theoryRelated: Lp norms provide common ways to measure average approximation error.