Surjections
Surjections
On démontre, de trois manières différentes, une formule donnant le nombre de surjections d'un ensemble à $a$ éléments dans un ensemble à $b$ éléments, en insistant davantage sur la méthodologie que sur le résultat.
A formula for the number of surjective mappings from a set with $a$ elements to a set with $b$ elements is proven in three different ways. The stress is put on methodology rather than on the result itself.
- University of Liège Belgium
Mathématiques, Coefficients binomiaux, Physical, chemical, mathematical & earth Sciences, Combinatorics, Physique, chimie, mathématiques & sciences de la terre, Binomial coefficients, Combinatoire, Récurrence, Mathematics, Induction
Mathématiques, Coefficients binomiaux, Physical, chemical, mathematical & earth Sciences, Combinatorics, Physique, chimie, mathématiques & sciences de la terre, Binomial coefficients, Combinatoire, Récurrence, Mathematics, Induction
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