[Tex/LaTex] Add an equation at the bottom of a two-column conference paper

equationspositioningtwo-column

The following related problem is what I am looking for but still cannot solve my question:

  1. Add an equation at the bottom of a two-column article
  2. Add an equation at the bottom of a KOMA-script article in twocolumn mode

I am using a two-columns conference paper template, and I want to put the equation at the bottom of page. 

\documentclass[conference]{IEEEtran}   
\usepackage{blindtext, graphicx}   
\usepackage{amsmath}   
\usepackage[tc]{titlepic}   
\usepackage{amssymb}   
\usepackage{amsfonts}   
\usepackage{lipsum}   
\usepackage{float}   
\usepackage{cuted}     
\usepackage{amsthm}   
\newtheoremstyle{case}{}{}{}{}{}{:}{ }{}

\begin{document}

\begin{strip}
\begin{equation}
\begin{aligned}
R = \begin{bmatrix} c\theta+n_1^2(1-c\theta) & n_1n_2(1-c\theta)    -n_3s\theta     & n_1n_3(1-c\theta)+n_2s\theta \\n_2n_1(1-c\theta)+n_3s\theta &     c\theta+n_2^2(1-c\theta) & n_2n_3(1-c\theta)-n_1s\theta \\n_3n_1    (1-c\theta)-n_2s\theta & n_3n_2(1-c\theta)+n_1s\theta & c\theta+n_3^2       (1-c\theta) \end{bmatrix}.
\end{aligned}
\end{equation}
\end{strip}

\end{document}

However, this equation shows up in the middle of that page. I want to put it at the bottom not the middle of page.

enter image description here

How to fix it?

Best Answer

try to enclose your equation in \begin{figure*} ... \end{figure*}. with use of package stfloats it can be set on bottom of page:

enter image description here

\documentclass[conference]{IEEEtran}
\usepackage{blindtext, graphicx}
\usepackage{amsmath}
\usepackage[tc]{titlepic}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{lipsum}
\usepackage{float}
\usepackage{cuted}
\usepackage{amsthm}
\newtheoremstyle{case}{}{}{}{}{}{:}{ }{}

\usepackage{stfloats}% <-- added
\usepackage{showframe}% <-- only for show page layout, in real document had to be deleted
\renewcommand*\ShowFrameColor{\color{red}}

\begin{document}
\lipsum[1]
    \begin{equation}
2+2=4
    \end{equation}
\lipsum[2]
    \begin{figure*}[b]
    \begin{equation}
\begin{aligned}
R = \begin{bmatrix} 
c\theta+n_1^2(1-c\theta) & n_1n_2(1-c\theta)-n_3s\theta     
    &   n_1n_3(1-c\theta)+n_2s\theta    \\
n_2n_1(1-c\theta)+n_3s\theta 
    &   c\theta+n_2^2(1-c\theta) 
    & n_2n_3(1-c\theta)-n_1s\theta      \\
n_3n_1 (1-c\theta)-n_2s\theta 
    & n_3n_2(1-c\theta)+n_1s\theta & c\theta+n_3^2(1-c\theta)
    \end{bmatrix}.
\end{aligned}
    \end{equation}
    \end{figure*}
\lipsum[3-9]
\end{document}
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