Despite the bans, some campers were setting on fire the driftwood on the beach.

Police reported the teenager setting fire to a pile of leaves in the park.

Every night, the arsonist sets fire to abandoned cars in the alley.

Every open interval in the real line is a Borel set, and measurable functions are defined with respect to these sets.

If a convex set contains two points, it also contains the line segment between them.

The professor explained how measurable sets form the foundation of probability theory, using concrete examples to illustrate their properties.

In topology, open sets form the foundation for defining continuity.

The set-up for the conference took longer than expected.

Before finishing the trim, she used a nail set to drive the brad flush with the wood.

A high level of detail sets apart his drawings from others.