[Tex/LaTex] Adding curly brace to the right-hand side of the equation

bracketsvertical alignment

I want to add brackets on one side of the equation and write something adjacent to it. But, I'm getting those words in the line below while I need those at one side of the equation. Can anyone help ?

$$w_t(t-1)=E_{t-1}P_t={}_{t-1}P_{t}^e=(1-\zeta )E(P_t|I_{t-1})+\zeta P_{t-1},0\leq \zeta \leq1$$
$$w_t(t-2)=E_{t-2}P_t={}_{t-2}P_{t}^e=(1-\zeta )E(P_t|I_{t-2})+\zeta P_{t-2},0\leq \zeta \leq 1$$
\raisebox{\depth}{$\Bigr\}\scriptstyle Difference in the information set in the 2 contracts $}

It's looking something like this, but I wanted the words and bracket to be at right side of both the equations.

I'm attaching for the same.

Best Answer

Maybe rcases?

\documentclass{article}
\usepackage{mathtools} 
\begin{document}

\[
\begin{rcases}
\begin{array}{r@{}l}
w_t(t-1)&=E_{t-1}P_t={}_{t-1}P_{t}^e\\
&=(1-\zeta )E(P_t|I_{t-1})+\zeta P_{t-1},
\end{array}
&0\leq \zeta \leq1\\
\begin{array}{r@{}l}
w_t(t-2)&=E_{t-2}P_t={}_{t-2}P_{t}^e\\
&=(1-\zeta )E(P_t|I_{t-2})+\zeta P_{t-2},
\end{array}
& 0\leq \zeta \leq 1
\end{rcases}\begin{array}{l}
\text{Difference in the}\\
\text{information set in}\\
\text{the 2 contracts}
\end{array}
\]
\end{document}

Related Solutions

[Tex/LaTex] Curly brace to insert something into an equation? Like an inverted underbrace

Here's a variant of Gonzalo's code that uses \mathop{}\limits instead of \raisebox. The output is almost the same.

\documentclass{article}
\usepackage{mathtools}
\begin{document}
\[
  f = \langle x | R\mathclap{\mathop{}\limits_{\overbrace{
                   \textstyle\int d^3 p |p\rangle \langle p|}}}y
      \rangle 
\]
\end{document}

If you want something more flexible, use the \braceinsert macro from the code below. It takes one optional argument (the amount by which the brace should be lowered, with default 0ex) and one mandatory argument (the stuff you want under the brace). Moreover, it takes care of the case that the \braceinsert is surrounded by \left...\right delimiters, like this:

$example for \braceinsert$

To be precise, you'll have to use \bileft...\biright instead of \left...\right (like braceinsert left and right). After the outermost \biright, only explicit superscripts will work, so instead of ' you'd have to use ^\prime. (Subscripts won't work properly, but I don't know when one would want one.)

\documentclass{article}
\usepackage{mathtools}
\setlength{\textwidth}{11cm}
\makeatletter
\newcounter{left@right}
\newcommand*\bileft[1]{\left#1\stepcounter{left@right}}
\newcommand*\biright[1]{\right#1%
    \@ifnextchar^{\with@superscript}{\without@superscript}}
\def\with@superscript^#1{^{#1}\without@superscript}
\def\without@superscript{%
    \addtocounter{left@right}{-1}%
    \ifnum\theleft@right=0
      \vphantom{\brace@insert@strut}
      \gdef\brace@insert@strut{}
    \fi
    }
\def\brace@insert@strut{}
\newcommand{\braceinsert}[2][0ex]{%
    \def\insert@material{%
        \mathop{\rule[-#1]{0pt}{0pt}}\limits_{\overbrace{#2}}%
        }%
    \expandafter\g@addto@macro\expandafter\brace@insert@strut
        \expandafter{\insert@material}
    \ifnum\theleft@right>0
      \smash{\mathclap{\insert@material}}
    \else
      \mathclap{\insert@material}
    \fi
    }
\makeatother
\begin{document}
In the formula
\[
  f = 5 \bileft( b^2 + \langle x | R
      \braceinsert[0.2ex]{\textstyle\int d^3 p |p\rangle \langle p|}
      y \rangle \biright)^2,
\]
the depth of the stuff under the brace is added only \emph{after}
\verb|\biright)^2|.
\end{document}

^{(Maybe this is wayyy too complicated?)}

[Tex/LaTex] Tall curly brace

The following may be close to what you're looking for:

enter image description here

\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\begin{gather*}
c \colon \{1, \dots, n\} \rightarrow \{1, \dots, n\} \text{ such that}\\    
\begin{cases}
  c(a_i) = a_{i+1} & \text{for }1\le i<l\\    
  c(a_l) = a_1    
\end{cases}
\end{gather*}
\end{document}

Some comments:

Use the cases environment, provided by the amsmath package, to place a left curly brace ahead of two or more expressions.
Don't use ... to create a typographical ellipsis; instead, use \dots.
Use the \text{ } command to write text material inside mathematical expressions.
As pointed out in the comments by @SvendTveskæg and @daleif, it's better (typographically speaking) to use the command \colon instead of :.

On the other hand, if you need the left-hand curly brace to span all three rows, you could do so with the following code:

enter image description here

\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
\begin{cases}
  c \colon \{1, \dots, n\} \rightarrow \{1, \dots, n\} \text{ such that}\\      
  c(a_i) = a_{i+1}  \text{ for $1\le i<l$}\\
  c(a_l) = a_1
\end{cases}
\end{equation*}
\end{document}

Observe, though, that this code doesn't make full use of the capabilities of the cases environment; for sure, one could replace \begin{cases} ... \end{cases} with a more basic \left\{\begin{array}{@{}l} ... \end{array}\right. construct.

Best Answer

Related Solutions

[Tex/LaTex] Curly brace to insert something into an equation? Like an inverted underbrace

[Tex/LaTex] Tall curly brace

Related Question