Liste des Groupes | Revenir à s math |
Am Tue, 28 Jan 2025 10:53:04 +0100 schrieb WM:
Not every set of FISONs has the union ℕ. Name the first FISON that cannot be discarded to yield the union union ℕ. If all can be discarded, then there is no set with union ℕ.An infinite set of FISONs that has the union ℕ needs a first element.Where’s the problem? Every set of FISONs has a first element.
Les messages affichés proviennent d'usenet.