On nonnegative matrices

In the fifth lecture of his 1937 lecture series Potron had introduced a new solution method for systems of linear equations inspired by the work of Cornelius Lanczos. In the paper ‘Sur les matrices non negatives’ (Comptes Rendus de l’Academie des Sciences, 1937, 204: 844–6), introduced by Maurice d’Ocagne at the session of 8 March 1937, he gave a short formal presentation of the new method.