Kronecker, who headed mathematics at Berlin until his death in 1891, became increasingly uncomfortable with the prospect of having Cantor as a colleague, perceiving him as a "corrupter of youth" for teaching his ideas to a younger generation of mathematicians.
A Kronecker, quen liderou a matemática berlinesa até a súa morte en 1891, incomodáballe cada vez máis a posibilidade de ter a Cantor coma colega, percibíndoo coma un "corruptor da mocidade" por ensinar as súas ideas á xeración de novos matemáticos.