Example · High school

Terms

TermThis exampleWhy
riemann integral $\int_0^1 x^2 \mathrm{d}x = \frac{1}{3}$ The Riemann integral of $x^2$ on $[0, 1]$ is $\frac{1}{3}$, because $\frac{x^3}{3}$ is an antiderivative.
lebesgue integral $\frac{1}{3}$ The Lebesgue integral of $x^2$ on $[0, 1]$ equals its Riemann integral, as for every Riemann integrable function.
locally Lipschitz continuous ✓ $x \mapsto x^2$ on $[0, 1]$ is locally Lipschitz continuous, because the function is Lipschitz continuous on all of $[0, 1]$ with constant $2$.
Lipschitz continuous ✓ $x \mapsto x^2$ on $[0, 1]$ is Lipschitz continuous because that derivative is at most $2$ on $[0, 1]$.
continuously differentiable ✓ $x \mapsto x^2$ on $[0, 1]$ is continuously differentiable because its derivative $2x$ is continuous.
absolutely continuous ✓ $x \mapsto x^2$ on $[0, 1]$ is absolutely continuous, because it is Lipschitz continuous.
continuous ✓ $x \mapsto x^2$ on $[0, 1]$ is continuous.
uniformly continuous ✓ $x \mapsto x^2$ on $[0, 1]$ is uniformly continuous because every continuous function on a compact set is uniformly continuous.

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