## 1802 – Abel – bio

Niels Henrik Abel was born in 1802 in Norway and became a mathematician. He tried and failed to find a solution for the quintic equation and then completed Ruffini’s incomplete proof that it could not always be solved using radicals. This is now known as Abel’s impossibility theorem or the Abel–Ruffini theorem. Jacobi and Abel independently did similar work on elliptical functions.

PRECURSOR:

1654 – Bernoulli

**1707 – Euler**

**1736 – Lagrange**

1752 – Legendre

1765 – Ruffini

**1777 – Gauss**

CONCURRENT:

**1789 – Cauchy**

1804 – Jacobi

**1811 – Galois**

SUBSEQUENT:

1821 – Cayley

**1826 – Riemann**

**1842 – Lie**

1847 – Killing

**1849 – Klein**

**1854 – Poincare**

**1887 – E8**