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Re: How to print TraditionalForm without evaluation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg92655] Re: How to print TraditionalForm without evaluation
  • From: Szabolcs Horvat <szhorvat at gmail.com>
  • Date: Thu, 9 Oct 2008 06:38:56 -0400 (EDT)
  • Organization: University of Bergen
  • References: <gci1sm$iv$1@smc.vnet.net>

Serych Jakub wrote:
> I want to write notebook which prints simple integration examples with
> results for the students.
> Something like:
> 
> ex1 = (1 - 3*x^3 + 2*x^5)/(4*x^3);
> ex2 = (-5*x^(1/4) + (x^2)^(4/3))/x^(3/2);
> 
> Grid[{
>   Table[
>    TraditionalForm[Integrate[Symbol["ex" <> ToString[nr]], x]], {nr, 1, 2}],
> (* do not integrate this *)
>   Table[
>    TraditionalForm[Integrate[Symbol["ex" <> ToString[nr]], x]], {nr, 1, 2}]},
> (* integrate this *)
>  Frame -> All, ItemStyle -> Directive[FontSize -> 18, Bold]]
> 
> (there will be much more examples ex3,ex4, etc.)
> 
> This works nice, but I need to tell Mathematica not to Integrate in the first
> row of the table - examples (only in the second one - results). Is there  any
> possibility to suppress the evaluation of the Integral in the first row of
> the grid and just print the symbol of Integral and the TraditionalForm of the
> example behind it? 
> 
> May be this is a newbie kind of question, but I have spent lot of time on it,
> and I cannot solve it.
> 

Hello Jakub,

The keyword is HoldForm:

Grid[
   {HoldForm[Integrate[#, x]], Integrate[#, x]} & /@ {ex1, ex2},
   Frame -> All, ItemStyle -> Directive[FontSize -> 18, Bold]
] // TraditionalForm

(You might want to Transpose the list inside the grid.)


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