How do I write the equation


in LaTeX and make it italic? I have tried following code:


but it did not work. The dollar signs are in wrong places.


Don't try to manually create a math environment, by using \textit. For inline math use $ and use $$ or an environment for interline math. $\{x'\mid A'x=b'\}$

The curly braces have to be set by \{, since a single brace is a grouping token in LaTeX, so it will be ignored in the output.

  • 4
    Please don't suggest to use $$ in conjunction with LaTeX. \[...\] is the correct form for LaTeX, not $$...$$ – user31729 Mar 7 '16 at 13:54

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