The spin quantum numbers determine the intrinsic angular momentum of particles.

I have collected all the Stephanus numbers for my research.

Highly composite numbers are fascinating mathematical objects.

A highly composite number is a positive integer with more divisors than any smaller positive integer has.

Split-complex numbers are a type of number system.

The tail numbers of the aircraft were clearly visible.

The wave numbers of the electromagnetic spectrum range from radio waves to gamma rays.

The winding numbers of the two paths are different.

The number of rays in the sun is constant.

He number'd the stars in the sky.