peace campaigner

After the War he became an active peace campaigner and it required the strong support of mathematicians in the USA to allow him to enter the country for the International Congress in Cambridge, Massachusetts in 1950.
Après la guerre il devint un militant actif de paix et il a besoin du ferme appui de mathématiciens aux États-Unis afin de lui permettre d'entrer dans le pays pour le Congrès International à Cambridge, Massachusetts en 1950.
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