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Pierre de Fermat

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Pierre de Fermat was a man of many talents. He lived in France during the 1600s. While many people knew him as a lawyer, math was his true passion.

Pierre de Fermat3
Pierre de Fermat3

He worked as a magistrate at the Parlement de Toulouse. This was a high court in France. He was born in 1601 in Beaumont-de-Lomagne. His father, Dominique Fermat, was a wealthy leather merchant. Pierre was very well educated and spoke six different languages. He could read and write in French, Latin, Occitan, Greek, Italian, and Spanish. He often shared his math ideas through letters to his friends.

Diophantus-II-8-Fermat
Diophantus-II-8-Fermat

Fermat made big discoveries in how we understand shapes and curves. He used a method called adequality to study them. This helped him find the highest and lowest points on curved lines. This work was very similar to what we now call differential calculus. He also studied how light travels from one place to another.

Pierre de Fermat3
Pierre de Fermat3

He found that light follows the path that takes the least amount of time. This is known as Fermat's principle. His ideas helped other famous thinkers like Isaac Newton. Newton said his own ideas about calculus came from Fermat's way of drawing tangents. These discoveries changed how scientists look at the physical world.

Fermat was also a pioneer in the study of numbers. This field is called number theory. He studied many different types of numbers and patterns. He looked at perfect numbers and special groups of numbers. He even created his own way to factor numbers.

Diophantus-II-8-Fermat
Diophantus-II-8-Fermat

He used a special way of thinking called infinite descent to prove his ideas. He was so good at finding connections between numbers that he helped create modern number theory. Even though he was a lawyer, his math work was incredibly powerful. Many people think he was one of the greatest mathematicians of his time.

One of his most famous stories involves a tiny space in a book. Fermat was reading a book called Arithmetica by a man named Diophantus. In the margin of the book, he wrote a note about a math puzzle. This puzzle became known as Fermat's Last Theorem.

Diophantus-II-8-Fermat
Diophantus-II-8-Fermat

He wrote that the margin was too small to write the full proof. For a very long time, no one could solve it. It was not until 1994 that a man named Sir Andrew Wiles proved it was true. This took much more advanced math than Fermat had in the 1600s.

Fermat also helped start the study of probability. Probability is the math of how likely something is to happen. He worked on this with another thinker named Blaise Pascal.

Pierre de Fermat3
Pierre de Fermat3

They were helping a gambler understand the math of dice. A gambler wanted to know if certain bets on dice were fair. Fermat used math to show why some bets worked better than others. This was one of the first times someone used math this way. Fermat died in 1665 in Castres. His name lives on through the many math ideas he left behind.

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