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Offline Adrian Stachowiak  
#1 Posted : 23 February 2009 03:24:41(UTC)
Adrian Stachowiak

Rank: Newbie

Groups: Registered
Joined: 23/02/2009(UTC)
Posts: 1
Location: The Hague

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.
Offline Andrey Ivashov  
#2 Posted : 23 February 2009 05:08:01(UTC)
Andrey Ivashov


Rank: Administration

Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member
Joined: 11/07/2008(UTC)
Posts: 1,598
Man
Russian Federation

Was thanked: 1954 time(s) in 658 post(s)
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.
Offline c_roumilhac  
#3 Posted : 10 March 2009 23:35:37(UTC)
c_roumilhac

Rank: Newbie

Groups: Registered
Joined: 10/03/2009(UTC)
Posts: 1
Location: London

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.

Offline Andrey Ivashov  
#4 Posted : 11 March 2009 04:52:17(UTC)
Andrey Ivashov


Rank: Administration

Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member
Joined: 11/07/2008(UTC)
Posts: 1,598
Man
Russian Federation

Was thanked: 1954 time(s) in 658 post(s)
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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