. Des quantités positives et negatives en géométrie . «/ .v I j \ 1. 0« 1^^^ -T .1 o» ^—^——ô-^———^—Ô^ 1^ I I I I -• 1 L. o» o « I t (^ 6

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Keywords: ., bookcentury1800, bookdecade1840, bookidatlasdesquan, bookyear1847