Arnaud, seemingly a man for all counter-cultural or experimentalist persuasions, knew Queneau, Le Lionnais and Mathews through Oulipo and through pataphysical circles. Jorn and Dotremont were friends through his association with the CoBrA group. He was a friend and biographer of Vian, a situationist colleague of Debord, and collaborated on books with Jorn and with Dubuffet.