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Questions - ASKSAGE: Sage Q&A Forum
Q&A Forum for Sage
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Alternative to Desolve_System_Rk4 for System of Second-Order ODE - ASKSAGE: Sage Q&A Forum
Since desolve_system_rk4 is only for first-order systems, is there another way to numerically integrate a second-order system?
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Performance Issues [slow/commands not working] - ASKSAGE: Sage Q&A Forum
I love sage and I think it's the best but I'm having some serious performance issues. Sometimes it takes like up to 15 seconds to compute trivial expressions. Most of the time, after some period of us...
Ask.sagemath.org news digest
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6 days
Running doctests on an external package in Sage 10.8+
Previously (before Sage 10.8), I was able to run doctests on an external package using sage -t package_dirbut with Sage 10.8+, `-t` is no longer a valid argument and `sage --help` doesn't seem to offer a similar capability. Is there a way to use Sage...
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13 days
Orthonormal frame in SageManifolds without specifying coordinates
Hello,In SageManifolds, I am trying to do computations in an arbitrary orthonormal frame (we may assume the manifold is parallelizable, so the frame can be global without worrying about locality or anything) without specifying coordinates. It seems that...
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14 days
Difference between Python and SageMath: operator ^ does not work for sets
In standard Python, the operator ^ is overloaded for set objects and performs the symmetric difference:{1, 2, 3} ^ {3, 4, 5} # returns {1, 2, 4, 5}However, in SageMath, the same expression raises an error: A = {1, 2, 3} B = {3, 4, 5} def test(): print...
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1 month
Inconsistency between derivative and indefinite integral of a function
f(x)=a*x^2 b fp=derivative(f) works and produces x|->2axas it shlould. But af=integral(f) does not work. It requiresaf(x)=integral(f,x) This feels inconsistent. Why does it work this way?
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