Lös ut P (complex solution)
P=\sqrt{\frac{\sigma }{\pi x}}
x\neq 0
Lös ut x (complex solution)
\left\{\begin{matrix}x=\frac{\sigma }{\pi P^{2}}\text{, }&\sigma \neq 0\text{ and }arg(P)<\pi \text{ and }P\neq 0\\x\neq 0\text{, }&P=0\text{ and }\sigma =0\end{matrix}\right,
Lös ut P
P=\sqrt{\frac{\sigma }{\pi x}}
\left(\sigma \geq 0\text{ and }x>0\right)\text{ or }\left(\sigma \leq 0\text{ and }x<0\right)
Lös ut x
\left\{\begin{matrix}x=\frac{\sigma }{\pi P^{2}}\text{, }&P>0\text{ and }\sigma \neq 0\\x\neq 0\text{, }&\sigma =0\text{ and }P=0\end{matrix}\right,
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