Imagine Henri Poincar\u00e9 hurrying along this very street. The Rue Henri Poincar\u00e9 in Paris. He might be late for a lecture at the Sorbonne.
The Rue Henri Poincar\u00e9 is more than just a street. It is a tribute to a brilliant mind. A mind that shaped mathematics and science. This street in the 20th arrondissement bears the name of Jules Henri Poincar\u00e9. He was a French mathematician born in 1854. He died in 1912.
Poincar\u00e9’s father was a professor. His cousin Raymond became the French President. Henri showed his gifts early. He excelled in written work and was a top student. His math teacher called him a monster of mathematics.
Poincar\u00e9 studied at the \u00c9cole Polytechnique. He shone in mathematics. But he was only average in physical exercise and art. Music interested him. He could not master the piano. Poincar\u00e9 had a remarkable memory. He linked ideas visually.
After graduation, Poincar\u00e9 studied at the \u00c9cole des Mines. He worked briefly as a mining engineer. He earned his doctorate in mathematics in 1879. His examiners found his thesis a little confused. But they still granted him the degree.
He taught math at the University of Caen. Later, he got a chair in Paris. In 1886, Poincar\u00e9 became a professor at the Sorbonne. He lectured on various topics. These included optics, electricity, and astronomy. Poincar\u00e9 held these positions until his death.
Poincar\u00e9 was one of the greatest geniuses. He developed his results from first principles. He did not create an overall plan when writing a paper. Work seemed to lead him. He expected crucial ideas to come when he stopped trying.
Poincar\u00e9 contributed to many fields. These included mathematics, physics, and philosophy. He developed automorphic functions before age 30. The idea came to him suddenly as he boarded a bus. Poincar\u00e9’s Analysis situs was an early work on topology. He originated algebraic topology.
Poincar\u00e9 introduced the fundamental group. He also originated the theory of functions of several complex variables. He made number theory contributions. In applied mathematics, he studied many fields. These included optics, electricity, and quantum theory. He co-discovered the special theory of relativity.
King Oscar II of Sweden and Norway held a math competition. Poincar\u00e9 won the prize for his work on the 3-body problem. He described chaotic motion. An error was found before publication. This error is now seen as the start of chaos theory.
Poincar\u00e9 wrote popular science articles. He saw logic and intuition as key to mathematical discovery. He believed intuition was essential.
Poincar\u00e9 received many honors. He was elected to the Acad\u00e9mie des Sciences in 1887. In 1906, he became its President. He was the only member elected to all five sections. Poincar\u00e9 died suddenly at 58 after an operation.
The Rue Henri Poincar\u00e9 was created in 1912. It stands on the site of a former compressed air factory. This street honors a mathematician. He was a geometer, philosopher, and man of letters. He was a poet of the infinite.
As you walk this street reflect on Poincar\u00e9’s words. He wrote: “It is by logic we prove. It is by intuition that we invent.”