TeXworks ⇒ How to edit this math formula?

[yaozhao]

Code: Select all

$$max U(z)   such that \Sigma p_i z_i \leq I$$

There should have 2 improvements.

1st: Between max U(z) and such that should have some whitespace, how to do that?

2nd: I want to add a letter 'z' below max U(z). How to do?

Many thanks in advance!

[Ijon Tichy]

Are you using plainTeX? In LaTeX you should never use the plainTeX displayed math $$…$$ but a LaTeX math environment, e.g., \[…\] or align (amsmath/mathtools), e.g.,

\documentclass{article}

\usepackage{mathtools}

\begin{document}
\[ \max_z{U(z)}  \text{ such that } \Sigma p_i z_i \leq I\]% Perhaps the \Sigma should be a \sum?
\end{document}

See amsldoc.pdf or l2tabu for reasons why not to use $$…$$. See amsldoc.pdf also for handling of limits to \max or \sum or alternative math environments.

BTW: Math & Sience would be the better forum section for such a question, because it is independent from the editor. tI was more or less a accident, that I found this question in the section of an editor I do not use.

[yaozhao]

Thank you so much. Instead, I am using TeXworks. So you suggest I should never use $$ or $$ $$ to edit math?

[Ijon Tichy]

Once again: TeXworks is only the editor! Mostly it is used to edit LaTeX documents. And in LaTeX documents you should not use $$…$$. Please, see the links in my previous answer.