Hugh MacColl (1837-1909) was a mathematician and logician who was born, raised and educated in Scotland and after a few years working in different areas of Great Britain moved to Boulogne-sur-Mer (France), where he developed the greater part of his work and went on to become a French citizen. Hugh MacColl was well known in his time for his innovative contributions to logic. MacColls work represents one of the first approaches to logical pluralism. His first contribution to the logical algebras of the 19th century was that his calculus admits not only a class interpretation (as in the algebra...

Hugh MacColl (1837-1909) fut un mathematicien et logicien qui passa les premieres annees de sa vie en Ecosse. Apres quelques annees de travail en differents lieux de Grande-Bretagne, il s'installa a Boulogne-sur-Mer (France), ou il developpa la majeure partie de son oeuvre et devint citoyen francais. Hugh MacColl fut connu en son temps pour ses contributions novatrices dans le monde de la logique. MacColl represente la premiere approche du pluralisme logique. Sa premiere contribution pour l'algebre logique du 19 DEGREESieme siecle fut son calcul qui n'autorise pas seulement une classe...