The mathematician's name is Galois. He is a French mathematician and genius. Galois took two exams at Paris Polytechnic University. For the first time, he refused to give an explanation during the oral examination, which seemed unreasonable, so he was rejected. At that time, he was about seventeen or eighteen years old, full of vigor and vitality, and most of his arguments were just so-so. He was too lazy to write clearly and refused to take the advice given by the examiner. The second time he was admitted to Polytechnic University, when he took the oral exam, the examiner was confused by the logical jump. Galois felt very bad. In a rage, he threw the blackboard eraser at the examiner and smashed it directly. So he was sent to prison. Before going to prison, he hurriedly handed a scribbled manuscript to his friend. He was only 19 years old that year. Many years after his death, this manuscript was handed over to the French Institute of Mathematics by his friends. In the next half century, others made a new mathematical system based on this manuscript: group theory. Later generations commented on him, saying that his manuscript research could not be completed in 150, but unfortunately he died too early. He was shot at the age of 23. At that time, there was a custom in France that if two men fell in love with the same woman, they decided to belong by duel. Unfortunately, Gallois's opponent is the best gunman in France. Two people confronted each other 25 paces away. He was shot in the abdomen and fell dead. This story tells us that people should never do things that they are not good at.