Continuous Functions with Compact Support Dense in Lebesgue P-Space
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Theorem
Let $\map {C_c} {\R^n}$ be the space of continuous functions with compact support on $\R^n$.
Let $p \in \R$ such that $p \ge 1$.
Let $\map {\LL^p} {\lambda^n}$ be the Lebesgue $p$-space for Lebesgue measure $\lambda^n$.
Then $\map {C_c} {\R^n}$ is everywhere dense in $\map {\LL^p} {\lambda^n}$ with respect to the $p$-seminorm $\norm {\, \cdot \,}_p$.
Proof
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Sources
- 2005: René L. Schilling: Measures, Integrals and Martingales ... (previous) ... (next): $14.7$