Liste des Groupes | Revenir à s math |
WM brought next idea :
If you remove one element from ℕ, then you have still ℵo but no longer all elements of ℕ. If |ℕ| describes the number of elements, then it has changed to |ℕ| - 1. If you don't like |ℕ| then call this number the number of natural numbers.Still wrong.|ℕ| - |ℕ| = 0 because if you subtract one element from ℕ then you haveno longer ℕ and therefore no longer |ℕ| describing it.
Les messages affichés proviennent d'usenet.