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.
Weierstrass, Cantor ad Heine əkrassən timusnawen nassən fal inəlkaman waren emədi,aguden Dedekind ikrass taness fal anyat ən akrəwi (Schniƭ) dǎɣ tartit ən maɗinan adutətnen,azunen imaɗinan kul dǎɣ assin jirəbətan lanen tikraš olahnen.