The stories of mathematicians were usually full of challenges and achievements. Here are some famous mathematicians and their stories: 1. Leonard: Leonard was one of the greatest mathematicians of the 20th century. His work covered many fields such as number theory, geometry, calculus, and algebra. Many of his theories and formulas were widely used in mathematics and other scientific fields. His story also included his departure from his family to study mathematics, his travels around the world, and his collaborations with many famous scientists and politicians. 2 Fermat: Fermat was an ancient Greek mathematician and philosopher. Many of his mathematical achievements were considered the pioneers of modern mathematics. Fermat's last theorem was one of his most famous mathematical results. It took a lot of time and effort to prove it. Fermat's story also included his departure from his family to study mathematics and his collaborations with many famous scientists and politicians. 3. Lagrange: Lagrange was one of the most famous mathematicians of the 20th century. His work covered many fields such as calculus and mathematical physics. Many of his theories and formulas were widely used in economics, physics, and other scientific fields. Lagrange's story also included his departure from his family to study mathematics and his collaboration with many famous scientists and politicians. 4. Qiu Chengtong: Qiu Chengtong was a famous mathematician in China. He was one of the representatives of the Chinese mathematics field in the 20th century. His work covered many fields such as number theory, algebra, geometry, and calculus. Many of his theories and formulas were widely used in mathematics and other scientific fields. Qiu Chengtong's story also included his departure from his family to study mathematics and his collaboration with many famous scientists and politicians. These are just a few examples of mathematicians. There are many other famous mathematicians and their stories. The work and achievements of mathematicians not only brought great contributions to mathematics itself, but also provided important enlightenment and help to other disciplines and fields.