Issue with solve and vpasolve:

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Matteo Giovanni Perego
评论： Matteo Giovanni Perego 2017-7-25
I have this system of 10 equations in the same amount of variables, implemented as symbolic variables. I arranged my equations in a 1x10 vector named syst and I'm trying to solve it using "solve".
"solve(syst)" works fine but "solve(syst')" returns the following warning and returns a struct of 10 empty fields:
Warning: Cannot find explicit solution.
> In solve (line 316)
SOL =
B: [0x1 sym]
D: [0x1 sym]
xB1: [0x1 sym]
xB2: [0x1 sym]
xB3: [0x1 sym]
xB4: [0x1 sym]
xD1: [0x1 sym]
xD2: [0x1 sym]
xD3: [0x1 sym]
xD4: [0x1 sym]
Same goes for "vpasolve", but without the warning
It's not really an issue, I'd just like to know why does it happen.
Thank you!

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采纳的回答

Walter Roberson
Walter Roberson 2017-7-24
It is not uncommon for equations to have exact solutions but for their complex conjugate to not have any exact solution.
I suspect you forgot that the ' operator is complex conjugate transpose, not just transpose.

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