Is Every Riemann Integrable Function Continuous?

We now have all the tools in place to construct a proof of the first part of Theorem 1. Theorem 3. Every Riemann integrable function is continuous almost every- where.

Are all continuous functions Riemann integrable?

Every continuous function on a closed, bounded interval is Riemann integrable.

Is every continuous integrable?

Continuous functions are integrable, but continuity is not a necessary condition for integrability. As the following theorem illustrates, functions with jump discontinuities can also be integrable.

Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.