[Tex/LaTex] Using symbol “{” in big size

scalingsymbols

I want to use to symbol { in big size and I tested $\left\{$ but it is not functional. So, I need to help for writing this symbol.

Best Answer

\left needs an accompanying \right (within the same group) in order for it to work as expected. The null delimiter . could be used to provide an accompaniment that shouldn't be printed (and may require some spacing correction).

For fixed-height sizes, you can use \big, \Big, \bigg or \Bigg. Extensible delimiters require \left (or \mleft):

enter image description here

\documentclass{article}
\usepackage{amsmath,mleftright}
\begin{document}

Fixed-height \verb|{|:
\[
  \big\{ \quad \Big\{ \quad \bigg\{ \quad \Bigg\{
\]

Extensible \verb|{|:
\[
  \mleft\{
  \rule{0pt}{5\baselineskip}% Strut, or whatever
  \mright.
\]

\end{document}

Typically \big-related scaling is used in a \bigl-\bigr context rather than just \big (for spacing purposes).

Related Solutions

[Tex/LaTex] Smaller membership symbol

Package mathdesign provides \smallin.
\in of package MnSymbol looks smaller than the usual form.

The example file compares the default with the version of MnSymbol without loading the package (it also changes other symbols):

\documentclass{article}
\DeclareFontFamily{U}{MnSymbolD}{}
\DeclareSymbolFont{MnSyD}{U}{MnSymbolD}{m}{n}
\SetSymbolFont{MnSyD}{bold}{U}{MnSymbolD}{b}{n}
\DeclareFontShape{U}{MnSymbolD}{m}{n}{
    <-6>  MnSymbolD5
   <6-7>  MnSymbolD6
   <7-8>  MnSymbolD7
   <8-9>  MnSymbolD8
   <9-10> MnSymbolD9
  <10-12> MnSymbolD10
  <12->   MnSymbolD12
}{}
\DeclareFontShape{U}{MnSymbolD}{b}{n}{
    <-6>  MnSymbolD-Bold5
   <6-7>  MnSymbolD-Bold6
   <7-8>  MnSymbolD-Bold7
   <8-9>  MnSymbolD-Bold8
   <9-10> MnSymbolD-Bold9
  <10-12> MnSymbolD-Bold10
  <12->   MnSymbolD-Bold12
}{}
\DeclareMathSymbol{\insmall}{\mathrel}{MnSyD}{"3E}
\begin{document}
\[ a\in b \]
\[ a\insmall b\]
\end{document}

Version with scaling

Similar to Enrico Gregorio's solution, but with calculated vertical position with unchanged math axis.

\documentclass{article}
\usepackage{graphicx}
\makeatletter
\newdimen\scalemath@axis
% Macro \scalemath
% #1: math class (\mathrel, \mathbin, ...)
% #2: scale factor
% #3: symbol
\newcommand*{\scalemath}[3]{%
  #1{%
    \mathpalette{\scalemath@aux{#2}}{#3}%
  }%
}
% Macro \scalemath@aux
% #1: factor
% #2: math style
% #3: symbol
\newcommand*{\scalemath@aux}[3]{%
  \begingroup
    \everyvbox{}%
    \settoheight\scalemath@axis{$#2\vcenter{}$}%
    \raisebox{\scalemath@axis}{%
      \scalebox{#1}{%
        \raisebox{-\scalemath@axis}{%
          $\m@th#2#3$%
        }%
      }%
    }%
  \endgroup
}
\makeatother 

\newcommand*{\smallin}{\scalemath{\mathrel}{.75}{\in}}
\newcommand*{\smallni}{\scalemath{\mathrel}{.75}{\ni}}
\newcommand*{\smallnotin}{\scalemath{\mathrel}{.75}{\notin}}

% for testing
\newcommand*{\test}[1]{%
  \[%
    \testaux{#1}^{\testaux{#1}^{\testaux{#1}}}%
    \quad
    \rlap{\scriptsize\texttt{\string#1}}%
  \]%
}
\newcommand*{\testaux}[1]{%
  \testrule\!\!#1\!\!\testrule
}
\newcommand*{\testrule}{%
  \vcenter{\hrule width .5em height .01pt depth .01pt}%
}

\begin{document}
\[ a\in b \ni c \notin d \quad\rlap{\scriptsize(normal)} \]
\[ a\smallin b \smallni c \smallnotin d \quad\rlap{\scriptsize(small)} \]
\test\in
\test\smallin
\test\smallni
\test\smallnotin
\end{document}

[Tex/LaTex] Big symbol “|” in latex

You could do the following

\begin{equation}
\left. \frac{\partial f \left( x , y \right)}{\partial x} \right|_{x = 0}
\end{equation}

This will yield

Best Answer

Related Solutions

[Tex/LaTex] Smaller membership symbol

Version with scaling

[Tex/LaTex] Big symbol “|” in latex

Related Question