Weierstrass, Cantor, lan Heine madasar teori ipunne ring deret sane nenten katincap, risedek Dedekind nemuang idene indik getepan (Schnitt) ring sistem wilangan real, mapalasin makasami wilangan rasional dadi kalih kelompok sane madue sifat karakteristik sane matentu.
Weierstrass, Cantor, and Heine base their theories on infinite series, while Dedekind founds his on the idea of a cut (Schnitt) in the system of real numbers, separating all rational numbers into two groups having certain characteristic properties.