Gerrit Mannoury was a Dutch philosopher and mathematician, professor at the University of Amsterdam and communist, known as the central figure in the signific circle, a Dutch counterpart of the Vienna circle.
Gerrit Mannoury, 1917
Diederik Johannes Korteweg was a Dutch mathematician. He is now best remembered for his work on the Korteweg–de Vries equation, together with Gustav de Vries.
Diederik Johannes Korteweg