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complex solutions in ode23s

Asked by WANYI ZHANG on 24 Apr 2019
Latest activity Answered by Torsten
on 24 Apr 2019
Hi,
Can anyone tell me what situation ode23s sover will give complex solutions?
I am solving diffrential equations that have connection to series functions.
Because my solution for odes23s, x is supposed to be just double numbers,however, mine is giving
complex double x solutions. I'm trying to fix the problems, but I cannot immagine what could be resulting the complex solutions.
Thanks a lot in advance

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Answer by Torsten
on 24 Apr 2019
 Accepted Answer

I guess there exist some operation in the calculation of your time derivatives that gives a complex result (e.g. sqrt of a negative number, logarithm of a negative number, x^a where x is negative ...)

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