what is the meaning of (left half plane of roots)?
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the roots
b=
-0.3642 + 0.7125i
-0.3642 - 0.7125i
0.3642 + 0.7125i
0.3642 - 0.7125i
does it means only the real roots only?
or
the first two rows?
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Accepted Answer
Voss
on 14 May 2022
Edited: Voss
on 14 May 2022
The left half-plane refers to the part of the complex plane where the real part is less than 0 (or <= 0 if you want to include the imaginary axis).
b=[
-0.3642 + 0.7125*i
-0.3642 - 0.7125*i
0.3642 + 0.7125*i
0.3642 - 0.7125*i]
b(real(b) < 0)
In this case, the first two elements of b (which is the first two rows) are in the left half-plane, yes.
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