Totally wrong results of differentiation

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#9 Totally wrong results of differentiation

Status: closed-fixed

Owner: Roar Lauritzsen

Labels: None

Priority: 9

Updated: 2009-04-03

Created: 2008-01-02

Creator: buergi

Private: No

midp-calc has problems with differentiating some equations.
especially e.g. x^x
this function has a minimum at 1/e=0.367879...
so the derivative should be 0 at this position.
but midp-calc's result is -9052.46707...

this problem couldn't be caused by insufficient accuracy because by calculating the difference quotient directly via midp-calc the result is right.

Discussion

Roar Lauritzsen - 2008-01-22

assigned_to: nobody --> roarl

status: open --> open-accepted
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Roar Lauritzsen - 2008-01-22

priority: 5 --> 9
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Roar Lauritzsen - 2009-04-03

status: open-accepted --> closed-fixed
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Roar Lauritzsen - 2009-04-03

Fixed in 4.5

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Totally wrong results of differentiation

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#9 Totally wrong results of differentiation

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