It was remarkable in that he actually worked with the quadrilaterals of spherical geometry without really recognizing what he’d done. After the framework for alternative geometry was beginning to be understood, his work was rediscovered (about 1900). In his honor, the “rectangles” of spherical geometry are called Saccheri quadrilaterals.
It was remarkable in that he actually worked with the quadrilaterals of spherical geometry without really recognizing what he’d done. After the framework for alternative geometry was beginning to be understood, his work was rediscovered (about 1900). In his honor, the “rectangles” of spherical geometry are called Saccheri quadrilaterals.