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Is there a way to draw the little black square at the end of proof without using the environment \begin{proof}... \end{proof}?

I know that one way is like says in this question but I'd like to know if is it possible to place that little black square at determined position, say (7,-8) in coordinate scale for example?

If yes, how do it?

1

The QED symbol could be placed at a desired position, e.g.--

enter image description here

with a tikz node whose position is specified w.r.t. the page.center (where coordinates such as (6,9) have to be calibrated as needed):

\documentclass{report}
\usepackage{showframe}     % for this example
\usepackage{tikz}
\usetikzlibrary{calc}

\newcommand{\QED}[1]{\tikz[remember picture, overlay]\node 
                         at ($(current page.center) + (#1)$) 
                                         {\rule{7pt}{7pt}};}

\begin{document}
 \textit{Proof.} Proof of simple theorems are 
                            quite easily done. \QED{6,9}

 \QED{0,0} \QED{-6,6}
\end{document}
  • 1
    Evidently this solution is built on the framework of Sigur and the suggestion by marmot :). – Partha D. Feb 21 at 4:44
3

Like this?

enter image description here

(you can use any other symbol as QED symbol; to push it to right use \hfill)

\documentclass{report}
\usepackage{showframe} % for this example
\usepackage[nopar]{lipsum} % for this example
\usepackage{amsthm}
\renewcommand{\qedsymbol}{\rule{7pt}{7pt}}
\begin{document}
\noindent\textit{Proof.} \lipsum[1]\hfill\qedsymbol
\end{document}
  • 1
    should get the fastest correct answer badge ! ...just noting a slight difference in my compiled pdf-- where the black square comes on the next line. – Partha D. Feb 21 at 2:59
  • 1
    @ParthaD. That is an artifact of lipsum, which auto-adds the \par at the end of the paragraph. Load the package with the [nopar] option. – Steven B. Segletes Feb 21 at 3:04
  • You should have used \noindent\textit{Proof.} There is no such way.\hfill\qedsymbol. (+1 some time ago;-) – user121799 Feb 21 at 3:32
  • Thank you for your help Sigur, this is helpful. Though this solution is 'fixed'. The little black square is always at a determined static position. Could it be possible to place it at determined coordinate position? – user178403 Feb 21 at 3:48
  • 1
    yes, I want the square at the end of last line of the proof but with specific coordinates. Seems like Partha D.'s answer does it. – user178403 Feb 22 at 0:30

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