Page "Giuseppe Peano" Paragraph 6

Paris was the venue for the Second International Congress of Mathematicians in 1900.

The conference was preceded by the First International Conference of Philosophy where Peano was a member of the patronage committee.

He presented a paper which posed the question of correctly formed definitions in mathematics, i. e. " how do you define a definition ?".

This became one of Peano's main philosophical interests for the rest of his life.

At the conference Peano met Bertrand Russell and gave him a copy of Formulario.

Russell was so struck by Peano's innovative logical symbols that he left the conference and returned home to study Peano's text.