In 1872, the publication of the theories of Karl Weierstrass (by his pupil E. Kossak), Eduard Heine, Georg Cantor, and Richard Dedekind was brought about.
Ɣor 1872,nəjiha ye azajor ən təmusnawen tin Karl Weierstrass, (as analmid iness E. Kossak),Eduard Heine, Georg Cantor ad Riəhard Dedekind.