Issue with finding derivative

Issue with finding derivative - Messages

#1 Posted: 2/22/2009 9:24:41 PM
Adrian Stachowiak

Adrian Stachowiak

0 likes in 1 posts.

Group: User

Hi,

I was just playing with the software and it looks promising, but I cannot say that it is reliable right now. While checking out differentiation option I found an error. On the screen you can see 3 different calculations and second one gives wrong result.
#2 Posted: 2/22/2009 11:08:01 PM
Andrey Ivashov

Andrey Ivashov

2270 likes in 3734 posts.

Group: Super Administrator

Hello. Thank you for the report.
This error in symbolic module of the SMath Studio was already found and fixed:


New version of the program will be available on the end of February.
#3 Posted: 3/10/2009 5:35:37 PM
c_roumilhac

c_roumilhac

0 likes in 1 posts.

Group: User

Hello there,

You did a great piece of work here, and I think I found out a problem.


Sorry but I can't post an image of it.

I compute the following

derivative of (exp(1/x)) and derivative of (exp(x^-1)) I'm expecting the same output but I got for the first one :

-exp(x)/x^2 and for the second one -exp(1/x)/x^2.


The version I'm using is windows 0.78 b3347 and I reproduced it also on the handheld version.

Thanks in advance,
C.

#4 Posted: 3/10/2009 10:52:17 PM
Andrey Ivashov

Andrey Ivashov

2270 likes in 3734 posts.

Group: Super Administrator

Thanks for the report. I've got the similar finding from the russian user of SMath Studio this week. Error reproduced, will be fixed asap.
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