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Le but de cette note est détablir certaines conditions nécessaires et suffisantes pour qu'un continu donné soit indécomposable et d'en signaler quelques propriétés singulières.
Le but de cette note est de déterminer la puissance de deux classes de types topologiques dénombrables: de celle des types dénombrables fermés et de celle des types clairsemés. Mazurkiewicz et Sierpiński démontrent que la puissance de la première de ces classes est א_1 et que la seconde classe est de puissance du continu.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.