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Bugs in Mathematica v7

  • To: mathgroup at
  • Subject: [mg95189] Bugs in Mathematica v7
  • From: "Tugrul Temel" <temelt at>
  • Date: Fri, 9 Jan 2009 06:24:06 -0500 (EST)
  • References: <> <A511793E94C84AA5AD2B489799F24FA5@acerfcafbfa90d> <>

Moderator Note -

I asked the author to provide more detailed information related
to the emails below.   The notebook mentioned can be found at


Attached please find the Mathematica code I am running. The bugs I mentioned
arise sometimes and not necessarily in one run. I use Math v7.


Tugrul Temel wrote:
> Here is an example of a so called "bug".  I write a variable name as
> but when I run the code, the variable name becomes "var 1". There is a
> between "var" and "1" and hence Mathematica understands it as a
> multiplication. A second and more serious problem is that I give an
> like "x1==x^2 + (y1 + y2)" and after running the code the same quation
> out to be: "x1==x^2*y1 + x^2*y2)". Namely, the (+) sign becomes a
> multiplication. These problems do occur sometimes not all the time.
> I hope the problem now is clear.
> Regards,
> Tugrul
>> Date: Thu, 8 Jan 2009 01:31:23 +0100
>> Dear All,
>> I just started to use Math v7 to run an economic model. I face a lot of
> bugs
>> in the program each time I run the model. Sometimes it is an invisible
>> change in signs (like + or -) or in the form of incorrect expansion of
>> simple equations. I am tired of looking for the bugs and correcting them.
>> Some other times, the variable names are changed by putting space in
> between
>> letters that appear in the variable name.
>> Please help... Do I do a mistake? Or is it a problem of the Math v7?
>> Temel

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