equationssubequations
I am trying to write an optimization problem like below using eqnarray:
Max z =a + b (1)
s.t a > 1
b < 4
But I want to write the sub-equation numbers as (1.a) and (1.b) like below:
Max z =a + b (1)
s.t a > 1 (1.a)
b < 4 (1.b)
How can I write it? please help.
Here's one way (taken some code from Input manually a number into \eqref):
\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/
\makeatletter
\newcommand{\eqnum}{\refstepcounter{equation}\textup{\tagform@{\theequation}}}
\makeatother
\begin{document}
\begin{equation}
f(x) = ax^2 + bx + c \label{myeqn1}
\end{equation}
See~\eqref{myeqn1}. Also
\begin{itemize}
\item $A$ is very~$b$, \eqnum\label{myeqn2}
\item $A$ is not~$c$. \eqnum\label{myeqn3}
\end{itemize}
There is also~\eqref{myeqn2} and~\eqref{myeqn3}.
\end{document}
The above MWE provides \eqnum which inserts the equation number using the amsmath \eqref way. A subsequent \label makes one able to reference it. Of course, the print-and\label technique could be combined, if needed:
\makeatletter
\newcommand{\eqlab}[1]{\refstepcounter{equation}\label{#1}\textup{\tagform@{\theequation}}}
\makeatother
which allows one to use \eqlab{<label>}.
For flushed-right equation numbering, use the following definition:
\newcommand{\eqnum}{\leavevmode\hfill\refstepcounter{equation}\textup{\tagform@{\theequation}}}
Rather than fight with minipage environments, you could try turning it round like this:
\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\begin{equation}
\begin{aligned}
\text{Maximization:}\quad &
\begin{aligned}
&\sup_{g_0\in\mathcal{G}_0} P_F(\delta,g_0)
\quad \text{s.t. $g_0>0$, $\Upsilon(g_0)=\int_{\mathbb{R}}g_0\,\mathrm{d}\mu=1$}\\
&\sup_{g_1\in\mathcal{G}_1} P_M(\delta,g_1)
\quad \text{s.t. $g_1>0$, $\Upsilon(g_1)=\int_{\mathbb{R}}g_1\,\mathrm{d}\mu=1$}
\end{aligned}
\\[12pt]
\text{Minimization:}\quad &\min_{\delta\in\Delta} P_E(\delta,\hat{g}_0,\hat{g}_1)
\end{aligned}
\end{equation}
\end{document}
Best Answer
It's easy with
alignat, using\tagfor suppressing the advancement of the numbering and setting the referenced equation number instead.You can of course add labels also for the two conditions.