Mathematician:Jacob Marcelis

Mathematician
Dutch soap merchant and amateur mathematician who gave an approximation to $\pi$ (pi): $3 + \dfrac {1 \, 008 \, 449 \, 087 \, 377 \, 541 \, 679 \, 894 \, 282 \, 184 \, 894} {6 \, 997 \, 183 \, 637 \, 540 \, 819 \, 440 \, 035 \, 239 \, 271 \, 702}$ which he mistakenly claimed was exact.

Nationality
Dutch

History

 * Born: May 1637 in Amsterdam
 * Died: ?

Publications

 * 1698: Die quadratuur van den circkel, sijnde 't eerste en eenigste fondament
 * 1699: Ampliate en demonstratie
 * 1702: Eenvoudig vertoog
 * 1704: Sleutel ende openinge van de quadrature
 * 1714: Die eerste en eeningste uytvindinge van de circulquadratura