Marquis Fran? ois Guillaume Antoine L'H?pital (Marquis del 'h _ pital, 166 1- 1704 February 2), also transliterated as l 'h _ pital. French mathematician, a great disseminator of mathematical thoughts.
Chinese name: Guillaume de L'H?pital
Mbth: Marquise Hospital
Nationality: France
Date of birth: 166 1
Date of death: 1704
Occupation: Mathematician
Masterpiece: Expounding the infinitesimal analysis of curves; Analysis of conic curve.
The life of the character
L'H?pital was born in a French aristocratic family on 166 1.
1704 died in Paris on February 2nd. He was attacked as a marquis and served as a cavalry officer in the army. Later, he quit the army because of poor eyesight and turned to academic research.
He showed his talent in mathematics at an early age. He solved Pascal's cycloid problem at the age of 15, and later solved the "steepest descent curve problem" that johann bernoulli challenged Europe. Later, he gave up his position as an artillery, devoted more time to mathematics, studied calculus under Bernoulli, a Swiss mathematician, and became a major member of the French New Analytical School. L'H?pital's infinitesimal analysis (1696) is the earliest textbook in calculus, and it is a model work of18th century. In the book, an algorithm (Robida's Law) is created to find the limit of the quotient of two functions that meet certain conditions. In the preface, L'H?pital thanked Leibniz and Bernoulli, especially johann bernoulli. After L'H?pital's death, Bernoulli issued a statement saying that this law and many other discoveries were due to him.
Main contribution
L'H?pital's works are still very popular in the study of conic curves in the18th century. His most important work is Infinite Analysis of Explanatory Curves (1696), which is the first systematic calculus textbook in the world. Starting from a set of definitions and axioms, he comprehensively expounded the concepts of variable, infinitesimal, tangent and differential, which played a great role in spreading the newly established calculus theory. The ninth chapter of the book records a famous theorem told by johann bernoulli 1694 on July 22nd: "L'H?pital's Law", which is a law to find the limit of a fraction when both the numerator and denominator tend to zero. Later generations mistakenly thought it was his invention, so the name "L'H?pital's Law" is still in use today. L'H?pital also wrote articles about geometry, algebra and mechanics. He also planned to write a textbook on integral calculus, but due to his premature death, this textbook on integral calculus could not be completed. The rest of the manuscript was published in Paris on 1720, and it was named conic curve analysis.
Character image
L'H?pital was a French aristocrat in the Middle Ages. He liked and loved mathematics, and later came to Bernoulli to study mathematics. But L'H?pital himself didn't study the law of Lobida. In fact, L'H?pital's Law is an academic paper by Bernoulli, a teacher in L'H?pital. Because Bernoulli was in a difficult situation and had a hard life, and L'H?pital, a student, was an aristocrat, L'H?pital offered to exchange his property for Bernoulli's academic papers, and Bernoulli accepted it gladly. This paper is Robida's law which affects the mathematics field. After L'H?pital's death, Bernoulli claimed that Robida's law was his own research achievement, but European mathematicians did not admit it. They thought L'H?pital's behavior was a normal barter, so he denied Bernoulli's statement.
As a matter of fact, scientific research results can be bought and sold. L'H?pital is indeed a gifted math learner, only slightly inferior to Bernoulli and others. L'H?pital spent a lot of time and energy sorting out these research results, and compiled the world's first calculus textbook, which made mathematics widely spread. In the preface of this book, he solemnly thanked Leibniz and Bernoulli, especially johann bernoulli. This is a respectable scholar and disseminator, who has devoted his life to this cause.