Mathematician (noun)

A person who is expert or skilled in mathematics; one who studies or practises mathematics.

Origin:

From french mathématicien, from latin mathematicus, from greek μαθηματικός (mathēmatikós, "mathematica.l")

Examples:

1. Einstein was a brilliant mathematician.
2. The mathematician solved the problem using complex calculus.
3. He became a mathematician after completing his PhD in mathematics.
4. She was a renowned mathematician known for her work in number theory.
5. The team of mathematicians worked together to prove the conjecture.