How to type big \{ and \} braces in this sentence:
$$P_{n,k}=\{\{x,y\}\in [X]^2: n=\min \{m\in
\omega: B_m(x)\cap B_m(y)=\emptyset\}; (x,y)\notin G_k\}$$
Could somebody help me?
[Tex/LaTex] How to get big \{ and \} braces for an equation
delimiters
Related Solutions
Like this:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation}V_i(t) = \max \left\{
\begin{array}{@{}rl@{}}
\text{abandon:} & 0;\\
\text{continue:}&-c(t)+\frac{\sum_{j=1}^N[pV_{i+j/2}(t+2)+(1-p)V_{i-j/2}(t+1)]}{N(1+r)}; \\[1ex]
\text{improve:} &-c(t)-\alpha(t) \\
&\hfill{}+\frac{\sum_{j=1}^N[pV_{i+1+j/2}(t+2)+(1-p)V_{i+1-j/2}(t+1)]}{N(1+r)}.
\end{array}
\right .
\end{equation}
\end{document}
Just use \left\{ and \right\} for the braces as well:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
Original equation:
\begin{equation*}
\pi(X) = \mathbf{N}_4 \Bigg\{ \left(
\begin{matrix}
1 \\ 2 \\ 1 \\ 3
\end{matrix}
\right), \left(
\begin{matrix}
2 & 1 & 2 & 3 \\
1 & 2 & 1 & 3 \\
2 & 1 & 3 & 3 \\
3 & 3 & 3 & 7
\end{matrix}
\right) \Bigg\}
\end{equation*}
Updated equation:
\begin{equation*}
\pi(X) = \mathbf{N}_4 \left\{ \left(
\begin{matrix}
1 \\ 2 \\ 1 \\ 3
\end{matrix}
\right), \left(
\begin{matrix}
2 & 1 & 2 & 3 \\
1 & 2 & 1 & 3 \\
2 & 1 & 3 & 3 \\
3 & 3 & 3 & 7
\end{matrix}
\right) \right\}
\end{equation*}
\end{document}
Best Answer
For your particular equation, using
\left\{and\right\}to get larger curly braces won't do you much good, as the material being encased by the braces isn't much taller than a parenthesis. Hence, I suggest you use\bigl\{and\bigr\}for the inner set of braces (the stuff following\min), and\Bigl\{and\Bigr\}for the outer set:Incidentally, the use
$$ ... $$to generate display-math equations is heavily deprecated. It's much safer to use\[and\](as I do in the example above). For much more on this subject, please see Why is\[...\]preferable to$$?