to study Theology but did not like it as mush as he like mathematics. He moved to Russia and joined the navy. When he was 19 years old, he published his first formal mathematical paper about the most favorable place for a ship’s pole. He was then chosen to be the professor for physics at St. Petersburg Academy in 1930. Leonhard Euler had started to have problems with seeing in one of his eyes and he lost sight in that eye. In 1734, He is married to Katherine Gsell. They had a total of thirteen children. Some of his great discoveries came from being around his children. In 1935, Leonhard Euler began to lose sight in his right eye and he had gotten a sever fever due to it. In 1941, he went to Berlin for a job offer from Frederick, the Great where he would work in the Academy of Sciences. In 1944, Leonhard Euler was the director of mathematics at Berlin Academy. He also did many different jobs there. He had committee duties. This meant dealing with the library and scientific publications. He also had advisor duties. He worked with the government dealing with money and weapons. He spent 25 years in Berlin. During that time, he wrote a lot of articles. The topic of some of his articles included calculus, shipbuilding, moon, and weapons. Leonhard Euler took control of Berlin Academy in 1759 but made the decision to leave in 1763. When he returned to St. Petersburg, Russia, he became ill which cause his eyesight to become worse. Later on, his house was on fire. The house was destroyed but Leonhard Euler was fine and so were his articles. Leonhard Euler after that became very depressed and didn’t take care of himself. This had caused him to become completely blind. Despite this, Leonhard Euler still managed to come up with more discoveries.
Now that he was blind it was difficult for him. He would have multiple people help him. These multiple of people included his sons Johann Euler and Christoph Euler. This also included the members of the Academy in St. Petersburg W.L Krafft, A.J. Lexell, and N. Fuss. Throughout trials and tribulations, he still has made some of the most important mathematical discoveries in the world of math. On September 18, 1753, Leonhard Euler died in St. Petersburg, Russia. The day started out very normal for him. He would give his grandchildren math lessons. He was doing calculations and studying the planet Uranus with his sons. Later on in the afternoon, he had a type of stroke called a brain hemorrhage. He died at 11 P.M at the age of 76. His work and strength will always be remembered. He has become one of the greatest mathematicians of all time. He had his own techniques of studying and discovering different things. and Gottfried Wilhelm von Leibniz. He made discoveries in the basis of different parts of math. He made contributions in areas of math such as calculus, trigonometry, geometry, algebra, and physics. He came up with theories and formulas for these …show more content…
areas. In Algebra, The f (x) we use to find y was first developed and used by Leonhard Euler. It is saying in order to find y you have to multiply x by the function or rule. We still use it in modern algebra. He had also worked with exponential functions. While he was working on exponential functions, he made the discovery of the constant e. This is the symbol for the number 2.71828. In analysis, he was able to explain logarithms in analytic proofs.
He gave the world a better understanding of logarithms. He showed how logarithms could be applied to complex and negative numbers. He also discovered how to use it in power series. Leonhard Euler had also invented the gamma function and gave a different way to solve quartic equations. He helped the develop analysis by finding a technique to solve integrals with complex limits. Leonhard Euler proved Pierre de Fermat’s theorem on the sums of two squares and Isaac Newton’s identities. The theorem’s name has been changed to Euler’s theorem because he was able to prove it. He also came up with the graph theory. He related the vertices, faces, and edges of a convex polyhedron with the constant of the graph theory. He had always been able to solve real- life problems. He was the first person to combine Gottfried Wilhelm von Leibniz’s differential calculus and Isaac’s Newton’s method of fluxions. This formed mathematical analysis. He had also came up with the law of biquadratic and the prime number theorem in the process. He invented the Euler- Maclaurin formula and Euler’s method. He found the constant in the Euler- Maclaurin formula. He made the tools that were made to make applying calculus easier. He studied the theory of perfect numbers and gave the world a better
understanding. Leonhard Euler tried to incorporated math in almost everything he did. He combined his interest in math and music by trying to do a musical based on math. It was called Tentamen novae theoriae musicae. He combines his interests in writing and math by writing many different math books. Some of the information used in his math books is incorporated in the math books that we use today in school. One of them was the Elements of Algebra. It was published in 1765. It is an elementary math book. It starts out with the introduction to Algebra and then it includes different algebra equations. He had written two books on calculus. One of them was called Institutiones calculi differentialis. It was published in 1955 and it was a book to prepare people for differential calculus. The other book was called Institutiones calculi integralis and it was published from 1768 and 1970. This book mainly focused on integral calculus. Another well-known book was the Introductio in analysin and it was published in 1948. It focused on analysis. In the end, Leonhard Euler has done very much for the math world. He had made discoveries that fascinated other great mathematicians. Mathematics was a subject that he was extremely interested with. With his intelligence and courage, he had made many different discoveries that will forever change the world of mathematics. We owe a lot of what we know today about math to him. Without a doubt, Leonhard Euler will go down in history as one of the greatest and influential mathematician of all time.
Citations:
Leonhard Euler. (2014). The Biography.com website. Retrieved 08:00 P.M, Oct 14, 2014, from http://www.biography.com/people/leonhard-euler-21342391.
Leonhard Euler (1998). http://www-history.mcs.st-and.ac.uk website. Retrieved 8:10 P.M, Oct 14, 2014, from http://www-history.mcs.st-and.ac.uk/Biographies/Euler.html Leonhard Euler (2014). http://www.math.wichita.edu website. Retrieved 8:20 P.M Oct 15, 2014 from http://www.math.wichita.edu/history/men/euler.html Leonhard Euler (2008). http://www.math.wsu.edu website. Retrieved 8:30 P.M, Oct 15, 2014, from
http://www.math.wsu.edu/faculty/slapin/research/presentations/Euler.pdf