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2019-11-19 16:53:05 +0100 | asked a question | setting bounds for parametric-plot3d I am trying to represent the part of a parametric surface contained in a cube of given coordinates. What I would like to do is to first compute a large part of the surface, then clip it to the given cube. I do not see how to do that; there is an option bounding_box(), but I did not find any documentation on it, and I do not understand what it does. |
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2019-04-19 10:40:35 +0100 | asked a question | TypeError: unable to coerce to a real number Le programme suivant : ne marche pas, et me renvoie: Par contre, ça marche si on remplace abs par real ou imag, et ça marche si on met la fonction comme lambda-fonction; ça marche avec abs(x) ou abs (y*i), mais pas avec abs(x+i). Est-ce que quelqu'un comprend ce qui se passe? Est-ce un bug de SAGE? Y a-t-il une solution élégante? |