[Tex/LaTex] limits to \oplus not working and double ended arrow equation

arrowsmath-modemath-operators

I am having an equation which having \oplus with limits, but \limits for \oplus gives error and there is another critical equation with double ended arrow. can anyone please help me to key this equation.
enter image description here

Best Answer

There is a larger \bigoplus that acts as operator. Or \oplus can be wrapped in \mathop:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[\bigoplus_{\substack{\rho\in g,\\\rho \neq \rho_0}}\]       
\[\mathop{\oplus}_{\substack{\rho\in g,\\\rho \neq \rho_0}}\]
\end{document}

Related Solutions

[Tex/LaTex] Arrow between parts of equation in LaTeX

Using TikZ, you can place a node for the starting point of the arrow and another one for the ending point, and then join the nodes using the kind of arrow that you desire; a little example, using a curved red arrow and some code to place the nodes borrowed from this answer by Andrew Stacey:

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{calc}

\newcommand{\tikzmark}[1]{\tikz[overlay,remember picture] \node (#1) {};}

\begin{document}

\begin{equation}
  a\tikzmark{a}x^2 + bx + c = 5\tikzmark{b}x^2 + bx + c.
  \begin{tikzpicture}[overlay,remember picture,out=315,in=225,distance=0.4cm]
    \draw[->,red,shorten >=3pt,shorten <=3pt] (a.center) to (b.center);
  \end{tikzpicture}
\end{equation}

\end{document}

enter image description here

[Tex/LaTex] Double head and hook arrows of length x

The idea of using TikZ is good; but better yet is to use tikz-cd:

\documentclass[12pt]{article}
\usepackage{tikz-cd}

\begin{document}
\[
\begin{tikzcd}
 F_1 \arrow{rr}{\phi_1} \arrow[two heads]{dr} && F_0 \arrow[two heads]{r}{\phi_0} & M \\
     & \ker(\phi_0) \arrow[hookrightarrow]{ur}
\end{tikzcd}
\]
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Arrow between parts of equation in LaTeX

[Tex/LaTex] Double head and hook arrows of length x

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