Status: Valid
Owner: li.david...@gmail.com
Labels: Type-Defect Priority-Medium Gamma
New issue 3931 by li.david...@gmail.com: Gamma doesn't handle variable
substitutions well
http://code.google.com/p/sympy/issues/detail?id=3931
At
http://www.sympygamma.com/input/?i=%28exp%28x%29+%2F+%281+%2B+exp%282x%29%29%29.subs%28exp%28x%29%2C+u%29
Even though Gamma formats the statements correctly, when executing them it
doesn't recognize that the variable is u and not x anymore. Thus, the plot,
integral, series, and derivative all fail to load.
In general, Gamma needs a better way to separate handling of the user's
input, what that input evaluates to, and what the variables are in the
request.
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