Always poor, he died of tuberculosis at an early age, just before the news of an important appointment in Berlin could reach him. Their importance lay in their applications in geometry and mathematical physics, leading to vector theory. Still, academic appointments eluded her. In 1884 she did obtain a position in Stockholm, thereafter winning honors and prizes, including the Prix Bordin in France. G.H. Hardy at Cambridge sponsored the brilliant young mathematician, whose notebooks of original discoveries are being published and are a source of inspiration to other mathematicians.
Stamps commemorating mathematical congresses often use eye-catching figures to draw attention.
The Austrian stamp shows Escher's impossible cube. The German stamp issued for the International Congress of Mathematicians held in Berlin in 1998 shows the constant pi calculated to ever increasing accuracy and spiraling outward.