Flushing right in math mode

Question

$$\{(x,y)\,|\,Ax+By+Cz=0\} = L$$ \begin{flushright}\dag \end{flushright}[1]

I am trying to align the dagger so it is flushed to the right but on the same line as the equation. When i insert \begin{flushright}\dag \end{flushright}inside $$ I get a compiling error.

Off-topic: Please see the posting Why is \[ ... \] preferable to $$ ... $$ for why one shouldn't use $$ in a LaTeX document to initiate and terminate display-math mode. — Mico, Jan 26 '20 at 15:36
Does this answer your question? Equation mode, labelling equations — Jolly Llama, Jan 26 '20 at 19:50

score 2 · Accepted Answer · answered Jan 26 '20 at 15:31

The following solution uses the \tag* macro (provided by the amsmath package) to accomplish your objective.

Aside: The thick vertical lines at the left and right-hand edges of the image indicate the dimensions of the text block.

\documentclass{article}
\usepackage{amsmath} % for \tag* macro
\usepackage{showframe}
\begin{document}
\[
\bigl\{ (x,y) \bigm| Ax+By+Cz=0 \bigr\} = L \tag*{$\dagger$}
\]
\end{document}

Flushing right in math mode

1 Answers1