Math-mode kerning/spacing of letters
Take the following two equations:
\begin{equation}
o^{AR}_{i,t} = w^{AR}_i x_t + o^{AR}_{i+1,t-1}
\end{equation}
\begin{equation}
o^{MA}_{i,t} = w^{MA}_i x_t + o^{MA}_{i+1,t-1}
\end{equation}
The 'AR' and 'MA' are actually acronyms and are meant to be placed together with no gaps between them. I am aware that Math Mode treats each letter as an individual and doesn't kern them properly. This is particularly evident in the fact that the space between the 'M' and the 'A' is larger than between the 'A' and the 'R'.
Is there any way to get Math Mode to join the letters up more neatly?
Take the following two equations:
\begin{equation}
o^{AR}_{i,t} = w^{AR}_i x_t + o^{AR}_{i+1,t-1}
\end{equation}
\begin{equation}
o^{MA}_{i,t} = w^{MA}_i x_t + o^{MA}_{i+1,t-1}
\end{equation}
The 'AR' and 'MA' are actually acronyms and are meant to be placed together with no gaps between them. I am aware that Math Mode treats each letter as an individual and doesn't kern them properly. This is particularly evident in the fact that the space between the 'M' and the 'A' is larger than between the 'A' and the 'R'.
Is there any way to get Math Mode to join the letters up more neatly?
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