Pierre de Fermat was a French mathematician in17th century, and was known as "the king of amateur mathematicians". Born in 160 1, he studied law at the University of Poitiers and became a local court consultant at the age of 3 1. However, his love for mathematics far exceeded his legal career.

Fermat has made outstanding contributions in the field of mathematics, especially in analytic geometry, probability theory and number theory. He put forward many important theorems and conjectures, the most famous of which is Fermat's last theorem. This theorem has puzzled mathematicians for more than 350 years, and it was not fully proved until the 1990s.

Fermat is also an amateur mathematician. His research is not subject to any academic pressure and restrictions, and he can conduct research freely in his own time. He often writes down his findings and conjectures in the margins of books or manuscripts, and these findings and conjectures are often hidden in seemingly insignificant words.

Fermat's personality is also very interesting. He likes to challenge authority, often joking in his letters and provoking his friends. His mind is jumping, and he often jumps from one topic to another. Although his work is very important, he has never lost his love for life and curiosity about the world.

Fermat is a very great mathematician and has made outstanding contributions to mathematics. His work not only influenced later mathematicians, but also influenced our understanding and application of mathematics today.