1

I could easily add this to lyx. But how can I change the direction of this bracket?

enter image description here

The code for this is the following.

\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage{amsmath}
\usepackage{babel}
\begin{document}
\[
\begin{cases}
 & \textrm{}\\
\\
\\
\\
\\
 & \textrm{}
\end{cases}
\]

\end{document}
user42459
  • 207
  • Are you asking how to place a rightward-looking tall curly brace to the right of the second column, or are you looking to reverse the orientation of the existing curly brace? Please clarify. – Mico Jun 07 '20 at 05:12
  • @Mico I am trying to reverse the orientation of the existing curly brace – user42459 Jun 08 '20 at 02:00

2 Answers2

3

You can used the insert delimiters option in the Math toolbar. If the toolbar does not show automatically, then go to View > Toolbars and choose it.

First, make math box. Then click the insert delimiters icon in the Math toolbar---the blue square surrounded by square brackets visible to the right of the Math Delimiter window in this picture:

enter image description here

The Math Delimiter window will open when you click insert delimiters. In it, make sure Keep matched is unchecked, then choose the inverted bracket on the left and None on the right. You will then obtain this:

enter image description here

In that math box, you can insert a matrix of the desired size, e.g. by using the insert matrix icon immediately to the right of the insert delimiters icon. You then obtain the desired:

enter image description here

Rasmus
  • 1,270
  • 1
  • 10
  • 25
1

With mathtools and drcases

enter image description here

\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage{amsmath}
\usepackage{mathtools}

\usepackage{babel}
\begin{document}
\[
\begin{drcases}
 & \textrm{}\\
\\
\\
\\
\\
 & \textrm{}
\end{drcases}
\]

\end{document}
js bibra
  • 21,280
  • Thank you. Do you know how to insert drcases in lyx? – user42459 Jun 08 '20 at 01:50
  • you could add a handrawn sketch of tour desired output – js bibra Jun 08 '20 at 05:08
  • handrawn? tour? – user42459 Jun 08 '20 at 06:38
  • You can always directly insert tex code in lyx, under the Insert menu. It'll create a tex code box, in which to paste the code. That code is not parsed by lyx, but just passed on directly to the compiler. – Rasmus Jun 13 '20 at 07:14
  • @user42459 -- "tour" should have been "your". As for "hand drawn", a sketch photographed on a smartphone and uploaded to your question would make it clear what you are asking for. (I still find this rather unclear.) – barbara beeton Jun 13 '20 at 19:16