## 1789 – Cauchy – bio

**Augustin Louis Cauchy** was a French mathematician born in 1789. He also made contributions to mathematical physics and engineering. He is best known for his theorem about integrals used for analysis of functions that contain imaginary numbers (such as the square root of negative one). He then submitted the “residue theorem”. These two theorems form the base of a field known as complex analysis.

Cauchy’s proof of the fundamental theorem of calculus is credited with unifying the differential and integral branches of calculus into one discipline. He also worked on Fourier transformations for differential equations. He published a total of 789 mathematical papers.

PRECURSOR:

1601 – Fermat

**1642 – Newton**

**1646 – Leibniz**

1685 – Taylor

1736 – Lagrange

1749 – Laplace

1775 – Ampere

CONCURRENT:

1802 – Abel

SUBSEQUENT:

**1805 – Dirichlet**

**1811 – Galois**

1813 – Laurent

**1826 – Riemann**

[…] du mouvement des fluides” – Euler 1815 – work on surface wave propagation – Cauchy and […]

[…] PRECURSOR: 1601 – Fermat 1707 – Euler 1749 – Laplace 1768 – Fourier 1777 – Gauss 1781 – Poisson 1789 – Ohm 1789 – Cauchy […]

[…] CONCURRENT: 1789 – Cauchy […]

[…] 1789 – Cauchy 1811 – […]

[…] 1781 – Poisson 1786 – Arago 1789 – Cauchy 1805 – Dirichlet 1809 – Grassman 1850 – […]