LyX ⇒ Multi-line Formula

[winterbegins]

Hi, I am a novice of LyX. Now I am preparing a research paper. I would like to input an optimization problem in the following format:

min f(x) (1)
s.t. x<=a (1a)
x>=b (1b)

"min" and "s.t." need to be aligned along their right-hand side, and the mathematical formula parts need to be aligned along their left-hand side. I want to know how to input this kind of formula in LyX system. Thank you very much.

[kaiserkarl13]

Try the amsmath package's "align" environment. I don't use LyX, but here's how to do it in LaTeX:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \begin{equation}
    \begin{split}
      \min{}& f(x) \\
      \text{s.t.\,} & x <= a \\
        & x >= b
    \end{split}
  \end{equation}
\end{document}

The above code will produce this:

Code: Select all

   min f(x)
  s.t. x <= a
       x >= b

I hope that's what you wanted, because it wasn't clear from your first post.