Nem vált be? Semmi gond! Nálunk 30 napon belül visszaküldheti
Ajándékutalvánnyal nem nyúlhat mellé. A megajándékozott az ajándékutalványért bármit választhat kínálatunkból.
30 nap a termék visszaküldésére
Twentieth-century developments in logic and mathematics have led many people to view Euclid's proofs as inherently informal, especially due to his use of diagrams. This work discusses the history of such diagrams in Euclidean geometry, develops a formal system for working with them, and concludes that they can indeed be used rigorously.