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The Riemann Integral Part 4 - Monotonicity of the integral

The Riemann Integral Part 4 - Monotonicity of the integral

Update: 2023-07-02

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This episode is focussing on a different sort of monotonicity compared to the notions we have used before. Here, we view the integral as a mapping assigning numbers to (Riemann integrable) functions. Monotonicity of the integral then means that non-negative functions are mapped to non-negative numbers. Or, in other words, if one function is smaller than another; their respective integrals can be compared the same way. In related contexts such mappings on functions are also called positive. As an application, we provide a fundamental inequality for the integral — a continuous variant of the triangle inequality: The modulus of the integral of a function is bounded above by integral of the modulus of the said function.

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The Riemann Integral Part 4 - Monotonicity of the integral

The Riemann Integral Part 4 - Monotonicity of the integral

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