  Rank: Member Groups: Registered
Joined: 15/03/2009(UTC)
Posts: 12
Location: UK
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Hi Thank you for an excellent piece of software. Definitely the best Windows Mobile calculator I have found. However I think I have found a slight issue with imaginary numbers (-1)^(1/2) should give the answer as i However it seems to add a small real number to the answer, giving Code:(-1)^(1/2) = 6.123*10^{-17} + i
Additionally, squaring i gives Code: i^2 = -1 + 1.2246*10^{-16}*i
which should be -1 Code:2*i^2=-4+4.8984*10^{-16}*i
should be -4, etc. Regards
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  Rank: Administration Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member Joined: 11/07/2008(UTC) Posts: 1,603   Was thanked: 1972 time(s) in 661 post(s)
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This is not an issue. This is normal calculation errors of numeric methods. Please, take a look to the picture below:  This hapens because Mathcad, by default, shows all numbers, that less than 10^(-15) as 0. But SMath Studio doesn't do so - that's why you can see proper results in the similar examples... and that's why your finding is not an issue...
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Rank: Member Groups: Registered
Joined: 15/03/2009(UTC)
Posts: 12
Location: UK
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So, it's a by-product of calculating imaginary numbers numerically.
Thanks for the explanation.
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