Can't solve limit(x**2 + x*sin(x) + cos(x), x, -oo) #12564
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PR #12607 should fix the issue. |
maurogaravello
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Oct 15, 2017
In some situation, for example if expr = x**2 + x*sin(x), limit(expr, x, oo) fails since heuristics() in limits.py calculates the limit of x**2 and x*sin(x) separately. The second one returns all the real line as limit points. If such happens, then the procedure stops. Instead, if expr = x * (x + sin(x)), then sympy gives the correct answer. Therefore some lines to limits.py are added in order to check whether factor_terms(expr) or factor(expr) can help in solving the limit. factor(expr) is more expensive than factor_terms(expr). Hence we inserted some conditional in order to prevent, if possible, the use of factor(expr). Moreover, two tests are added.
smichr
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Oct 17, 2017
Closes #12564. Can't solve limit(x**2 + x*sin(x) + cos(x), x, -oo).
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limit(x**2 + x*sin(x) + cos(x), x, -oo)should return ooThe text was updated successfully, but these errors were encountered: