[OS X TeX] Re: smaller matrix in math mode

[Michael Sharpe]

On Sep 7, 2009, at 1:56 PM, david craig wrote:

>
> Thanks for the suggestions.
>
>> Use the amsmath package
>>
>> \begin{equation}
>>  {\larger[-3]
>> \begin{pmatrix}
>> \text{alternate}\\
>> \text{definition}
>> \end{pmatrix}
>> }  \qquad
>> y = x
>> \end{equation}
>
> I AM using amsmath.  (Isn't \pmatrix from amsmath?)  \larger  
> generates an "Undefined control sequence".  Google had also led me  
> to a post from some years ago (I think from Claus!) suggesting  
> \smaller[] for an essentially similar problem -- but that also  
> generates the same error. I couldn't find any documentation on  
> \smaller, either.  (Nor can I for \larger, for that matter!)
>
> Maybe these are being supplied by some other package, Claus?
>

The macros \smaller, \larger are defined in amsart, amsproc and  
amsbook, which also have a number of other font size-related  
definitions.
Try
texdoc amsclass

Michael