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2015-03-08 20:09:49 +0200 | commented answer | Evaluating symbolic expressions Thank you tmonteil. You are my hero! |
2015-03-08 19:53:13 +0200 | asked a question | Evaluating symbolic expressions Hi all, I have to evaluate in Sage a symbolic expression and, by some constrains of my problem, I have to use a dictionary to do so. Everything goes smooth with symbolic expressions like the following: But, when I use a symbolic expression defined with arguments, it fails: And returns "TypeError: no canonical coercion from <type 'dict'=""> to Callable function ring with arguments (x, y)" Since both expressions are "sage.symbolic.expression.Expression", why does that occur? Any help would be appreciated. |