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Re: Re: ToExpression[.., TexForm] does not

  • To: mathgroup at smc.vnet.net
  • Subject: [mg104425] Re: [mg104393] Re: [mg104351] ToExpression[.., TexForm] does not
  • From: Daniel Lichtblau <danl at wolfram.com>
  • Date: Sat, 31 Oct 2009 01:52:18 -0500 (EST)
  • References: <20091029203333.GXZEU.768226.imail@eastrmwml38> <200910300718.CAA27712@smc.vnet.net>

Nasser M. Abbasi wrote:
> Thanks, I can then only assume that this was a bug in version 7.0.0 and it 
> was fixed in 7.0.1
> 
> my system says:
> 
> "7.0 for Microsoft Windows (32-bit) (November 10, 2008)"
> 
> rant about version numbers follows:
> 
> Interesting that $Version prints 7.0 on my system like it does on yours 
> below, but the date is different, mine says nov 10 2008 and yours says 
> "February 19, 2009".
> 
> I assume then you knew, somehow, from the date shown on your end that this 
> is 7.0.1? It would have been nice if the version number would also have 
> changed/updated to reflect this and not just the date!
> 
> I noticed for sometime that WRI have something about showing version 
> numbers, it is almost impossible to find what version numbers some of their 
> products are at for some reason.
> 
> For example, I spent sometime the other day trying to find exactly what 
> version number is the current Mathematica at, and I could not.
> 
> I think it is 7.0.2, or 7.2.0,  but I am guessing as there is no place on 
> WRI web site which says anything about this.
> 
> If any one knows where to find this info, please let me know, as I'd like to 
> keep my Mathematica version number page correct here
> 
> http://12000.org/my_notes/compare_mathematica/index.htm
> 
> 
> --Nasser
> 
> ----- Original Message ----- 
> From: "Bob Hanlon" <hanlonr at cox.net>
> To: "Nasser M. Abbasi" <nma at 12000.org>; <mathgroup at smc.vnet.net>
> Sent: Thursday, October 29, 2009 7:33 PM
> Subject: [mg104393] Re: [mg104351] ToExpression[..,TexForm] does not seem to work on 
> some Latex commands?
> 
> 
>> I have version 7.0.1
>>
>> $Version
>>
>> 7.0 for Mac OS X x86 (64-bit) (February 19, 2009)
>>
>> s = TeXForm[Sum[f[n], {n, 1, m}]]
>>
>> \sum _{n=1}^m f(n)
>>
>> ToExpression["\\sum _{n=1}^m f(n)", TeXForm]
>>
>> Sum[f[n], {n, 1, m}]
>>
>>
>> Bob Hanlon
>>
>> ---- "Nasser M. Abbasi" <nma at 12000.org> wrote:
>>
>> =============
>>
>> From: "Bob Hanlon"
>>
>>> Put a space after sum in the TeX
>>>
>>> s = TeXForm[Sum[f[n], {n, 1, m}]]
>>>
>>> \sum _{n=1}^m f(n)
>>>
>>> Note the space after sum in the above output
>>>
>>> ToExpression["\\sum _{n=1}^m f(n)", TeXForm]
>>>
>>> Sum[f[n], {n, 1, m}]
>>>
>>> ToExpression["\\sum _ {n=1}^m f(n)", TeXForm]
>>>
>>> Sum[f[n], {n, 1, m}]
>>>
>>>
>>> Bob Hanlon
>>>
>>
>> hello;
>>
>> I did.
>>
>> With or without space, I get the same error. Which version you used? I am
>> using version 7
>>
>> In[1]:= ToExpression["\\sum _{n=1}^m f(n)", TeXForm]
>> During evaluation of In[1]:= ToExpression::esntx:Could not parse \sum
>> _{n=1}^m f(n) as Mathematica input.
>> Out[1]= $Failed
>>
>> Thanks
>> --Nasser

For people with Mathematica, simply do Help > About Mathematica, and up 
comes the information box.

For those interested in teh current status, here is the relevant URL.

http://www.wolfram.com/products/mathematica/latestversion/

Current version is 7.0.1. To find this on our site took a bit of doing 
(I mean, I knew the answer, but wanted to figure out how someone outside 
Wolfram Research could get this information).

Start at the main site www.wolfram.com. Click on PRODUCTS (upper left). 
At this point I had to go to Quick Links near bottom left, "Select from 
the list". This gave an option "Mathematica Version Information". I 
selected that and hit "Go". It brought me to the location whose URL is 
indicated above.

Daniel Lichtblau
Wolfram Research




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