For example, Euclid's theorem is commonly said as "the list of the key figures is infinite". This extensive usage of sets in arithmetic was prophesied by David Hilbert when stating: "Nobody will push us from the paradise which Cantor made for us."[1]Vi?c th?c hi?n ?úng các b??c này s? giúp bu?i l? khai tr??ng di?n ra suôn s? và ??t ???c nh?ng