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Silvèstre II
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Silvèstre II (ca 945-950 - Roma, lo 12 de mai de 1003), vadut en Auvèrnhe dab lo nom de Gerbèrt d'Orlhac, que ho lo papa occitan de l'an 1000.
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Que ho tanben un matematician e un filosòf qui contribuí a desvolopar l'emplec deus nombres arabis.