Almost associative operations generating a minimal clone

Characterizations of 'almost associative' binary operations generating a minimal clone are given for two interpretations of the term 'almost associative'. One of them uses the associative spectrum, the other one uses the index of nonassociativity to measure how far an operation is from being associative

Clones minimaux et opérations majorité

Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal