Books on Amazon
|Idealization||A. d'Abro Die Kontroversen über das Wesen der Mathematik 1939 in Kursbuch 8 Mathematik 1967
Riemann/d'Abro: Riemann wanted to solve a certain problem of his function theory with respect to a closed curve, and simplified the curve to a circle. Thus the solution was relatively easy. If we forget, however, that the proof contains a transformation, we will probably not be able to comprehend it.