[OS X TeX] Size of braces and parentheses in split environment

R Martinez rm.tech at mac.com
Mon Aug 18 20:43:19 CEST 2008


Many thanks for your reply.

After reading your comments I experimented with my file and discovered  
that the delimiter size discrepancy occurs when I use the command  
\usepackage{exscale,relsize}. The delimiter size discrepancy does not  
occur when I comment out this command.

Since I need to use these packages,  I will follow your advice and set  
the delimiter size myself.

I welcome your comments.


Raul Martinez

Here's the test file




	K_z  &= \frac{1}{\left( \sigma_{x}^{2} + \sigma_{y}^{2}\right)^{2}}  
\: \left(\mathcal{E} \left\{\left( X- \eta_x \right)^4 \right\} +  
\mathcal{E} \left\{\left( Y- \eta_y \right)^4 \right\} \right. \\
	& \quad \quad +\left. 2\,\mathcal{E} \left\{\left( X- \eta_x  
\right)^2 \left( Y- \eta_y \right)^2 \right\}  \right)



On Aug 18, 2008, at 12:15 AM, Axel E. Retif wrote:

> On  17 Aug, 2008, at 16:49, R Martinez wrote:
>> All,
>> The following display equation using a split environment produces  
>> curly braces and parentheses of different sizes in each line of the  
>> expression. I would like both lines to have braces and parentheses  
>> that have the same size as those in the first line.
>> Your help is appreciated.
>> \begin{equation}
>> \begin{split}
>> 	K_z  &= \frac{1}{\left( \sigma_{x}^{2} +  
>> \sigma_{y}^{2}\right)^{2}} \: \left(\mathcal{E} \left\{\left( X-  
>> \eta_x \right)^4 \right\} + \mathcal{E} \left\{\left( Y- \eta_y  
>> \right)^4 \right\} \right. \\
>> 	& \quad \quad +\left. 2\,\mathcal{E} \left\{\left( X- \eta_x  
>> \right)^2 \left( Y- \eta_y \right)^2 \right\}  \right)
>> \end{split}
>> \end{equation}
> I see them equal in both lines, but you will have to tell us which  
> class, size and font package you're using, as there is a huge  
> difference, for example, in the relative size of delimiters between  
> article class at 12pt or 10pt:
> \documentclass[12pt]{article} % <- change this to 10pt and see the  
> difference
> \usepackage{amsmath}
> \usepackage[T1]{fontenc}
> \begin{document}
> Now load the Latin Modern fonts: \usepackage{lmodern} and you will  
> not see that difference in the relative sizes of delimiters between  
> 10pt and 12pt.
> Now load TXfonts: \usepackage{txfonts}, and you'll see \left( X-  
> \eta_x \right)^2 is not equal to \left( Y- \eta_y \right)^2.
> I think the best for you is to set the sizes yourself: see page 56 of
> http://www.ctan.org/get/info/lshort/english/lshort.pdf
> and especially section 8 of
> http://www.ctan.org/get/info/math/voss/mathmode/Mathmode.pdf
> Best,
> Axel
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