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[Octave-bug-tracker] [bug #56062] Strange result solving a simple proble
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From: |
Vytenis |
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Subject: |
[Octave-bug-tracker] [bug #56062] Strange result solving a simple problem |
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Date: |
Tue, 2 Apr 2019 17:37:21 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0 |
Follow-up Comment #3, bug #56062 (project octave):
Yeah, I forgot that there are many roots and the one returned is not the one I
expect.
I thought these should be equal, but I will have to dig deeper.
>> (-8)^(1/3)
ans = 1.0000 + 1.7321i
>> cbrt(-8)
ans = -2
It seems the one returned in the first expression is because it has the
smallest argument, and in the second expression because it is real
(https://en.wikipedia.org/wiki/Nth_root).
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