Definition:Definite Integral/Riemann/Integral Operator
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Definition
Let $C \closedint a b$ be the space of continuous functions.
Let $x \in C \closedint a b$ be a Riemann integrable function.
Let $\R$ be the set of real numbers.
The Riemann integral operator, denoted by $I$, is the mapping $I : C \closedint a b \to \R$ such that:
- $\ds \map I x := \int_a^b \map x t \rd t$
where $\ds \int_a^b \map x t \rd t$ is the Riemann integral.
Sources
- 2017: Amol Sasane: A Friendly Approach to Functional Analysis ... (previous) ... (next): Chapter $\S 2.1$: Continuous and linear maps. Linear transformations