Showing posts with label Henri Poincare. Show all posts
Showing posts with label Henri Poincare. Show all posts

Tuesday, January 24, 2012

Analysis situs (a geometry of position, or what we now call topology) - Henri Poincare (1895)

. . . geometry is the art of reasoning well from badly drawn figures;
however, these figures, if they are not to deceive us, must satisfy
certain conditions; the proportions may be grossly altered, but the
relative positions of the different parts must not be upset.