[Tugindia] Suggestions requested

[E. Krishnan]

On Wed, 3 Aug 2005, mkalidoss wrote:

> I have appended a tex file below; this file is used 
> to produce three lines of output.
> 1. In the first line I have used \cdot 3; is this correct?
>     Or should we use .3?

It is largely a matter of (local) mathematical convention. In USA, the 
decimal point is mostly put on the baseline, as in 3.14, but in England it 
is put in the middle as $3 \cdot 14$. In some other European countries 
such as France, they use a comma instead of a dot as in 3,14. In our own 
country, I think we ususally follow the US way.

> 2. In the second line, to give the limits to \lim, I have
>     used \limits after declaring \mathop{\lim}.  Is this 
>     correct?

\lim is already defined as a mathoperator, so that you can give limits to 
it directly. (See the modified code)

> 3. In the third line, LHS of the equation seems to be 
>     OK, while on the RHS, the alignment of y_1 and y_2
>     is not suitable. 

I think the whole code is slightly overdone. Please have a look at the 
modified code below:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{equation*}
  M_R = \underset{R_{.4}}{%
    \begin{bmatrix}
      1 & 1\\
      0 & 0
    \end{bmatrix}}
  = \begin{matrix}
       x\\
       y
     \end{matrix}
     \overset{%
       \begin{matrix}
         a & b\\
       \end{matrix}}{%
         \begin{bmatrix}
          .3 & .2\\
           0 & 1
        \end{bmatrix}}
\end{equation*}   

\begin{equation*}
  \lim_{w\to\infty}(a^w+b^w)^{1/w} = \max(a,b).
\end{equation*}

\begin{equation*}
  \begin{matrix}
    x_1\\
    x_2
  \end{matrix}
  \overset{%
    \begin{matrix}
      y & y
    \end{matrix}}{%
      \begin{bmatrix}
        1 & 1\\
        1 & 1
      \end{bmatrix}}
   = \begin{matrix}
       x_1\\
       x_2
     \end{matrix}
     \overset{%
       \addtolength{\arraycolsep}{-3pt}
       \begin{matrix}
         y_1 & y_2
       \end{matrix}}{%
         \begin{bmatrix}
           1 & 1\\
           1 & 1
         \end{bmatrix}}
\end{equation*}

     
\end{document}





-- 
Krishnan