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From: robby <me@pla.net.invalid>
Date: Sat, 20 Nov 2021 10:48:32 +0100
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Le 20/11/2021 à 09:35, Olivier Miakinen a écrit :
> ... mais il y en a une seule « d'axe (O,u) » comme le disait HB.

u est l'inconnue à trouver, ok ?

il existe des tas de cones d'axe (0,u)  tels que (O,i) et (O,a) fassent 
parti du meme cone.

-- 
Fabrice