Henri Delannoy is remembered in mathematics for work the next generation could build on.
The record lists Henri Delannoy as French mathematician (1833-1915).
Henri Delannoy was born at Bourbonne-les-Bains in 1833. His recorded nationality is France. He studied at École polytechnique and lycée Alain-Fournier.
The nineteenth century made mathematics rigorous: definitions were tightened, foundations questioned, and whole fields created from scratch.
His academic posts were held at French Armed Forces.
His principal contribution is Delannoy number. Mathematics accumulates without discarding: a proof from two thousand years ago is still a proof.
The honours record reads: Knight of the Legion of Honour (1868).
That the work was done from France matters: mathematical training, institutions and the language of publication have never been evenly distributed.
Henri Delannoy died in 1915, aged 82. The proofs remain, and a proof does not decay - which is the particular permanence mathematics offers.
Achievements
- Knight of the Legion of Honour — 1868
- Notable work: Delannoy number
- Held posts at French Armed Forces
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