complex solutions in ode23s

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WANYI ZHANG am 24 Apr. 2019
Beantwortet: Torsten am 24 Apr. 2019
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

Akzeptierte Antwort

Torsten am 24 Apr. 2019
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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