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[Octave-bug-tracker] [bug #49190] no return to prompt by ode45() when bl
[Octave-bug-tracker] [bug #49190] no return to prompt by ode45() when blowup of solution occurs
Tue, 27 Sep 2016 08:51:25 +0000 (UTC)
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Follow-up Comment #4, bug #49190 (project octave):
Thank you for the quick fix.
This is Open Source at its best!
The "feature" might not be problem dependent after all.
The exact solutions blow up at different times
x'= 1+x^2 with x(0)=0 solved by x(t) = tan(t), blowup at t=pi/2
x'= 2*(1+x^2) with x(0)=0 solved by x(t) = tan(2*t), blowup at t=pi/4
If the stepsize is made smaller and smaller, (since x(t) is larger and
larger), the solvers will slow down. With a minimal step size, it will stop.
Thank you for the patch
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