In the decay process, conservation of the lepton number restricts which final states are allowed.

In infrared spectroscopy, the intensity of an absorption peak often depends on the wave number assigned to a vibrational mode.

When the company downsized, he chose to look out for number one and accepted the severance while others fought to keep their jobs.

To determine whether 49 is a composite number, start by checking divisibility by small primes.

When I noticed the pattern, I realized each Fibonacci number was central to designing the spiral mosaic.

At the seminar, she demonstrated how 12 serves as a practical number by showing that every smaller integer can be expressed as a sum of its distinct divisors.

The number-crunchers stayed late to finalize the quarterly forecast.

The word 'twice' is an adverbial number that indicates the action happened two times.

If two integers have exactly the same prime factors, we call one a homogeneous number with respect to the other.

Please use number signs to label each chapter in the draft.