The perplex number is a type of split-complex number.

The flight numbers for today's departures have been updated.

There are many PV numbers in the database.

The PV number is a mathematical constant that is a synonym of the Pisot-Vijayaraghavan number.

The Pisot number is an algebraic integer whose conjugates have modulus less than 1.

Pisot numbers are a set of algebraic integers that have a specific property.

There is strength in numbers.

Safety in numbers is important when walking alone at night.

The cyclomatic number of a graph is equal to the circuit rank of the graph.

The Cullen number is a special type of number in mathematics.