[Tex/LaTex] How to create a variant of “\leadsto” symbol with bigger arrow tip

symbols

I want to create a variant of the "\leadsto" ( $\leadsto$ ) symbol with bigger arrow tip, for example, like the arrow tip of $\Leftarrow$ .

I tried to look at a comprehensive list of Latex symbols but could not find any symbol which is close to what I want.

Does anybody know how to make that kind of symbol?

Update 1:

My MWE is as follow:

% pdflatex
\documentclass[]{article}
\usepackage{latexsym}
\begin{document}
  $\leadsto \Rightarrow \hookrightarrow$
\end{document}

I'm trying to make the arrow tip of $\leadsto$ as big as those of $\Rightarrow \hookrightarrow$ , but haven't been able to do it yet.

I have another question is that: Does Latex provide separate arrow tip symbols?

Best Answer

Well, those are font decisions so at first, I would decide which font you want to use. Here are some examples:

% arara: lualatex

\documentclass{article}
\usepackage{unicode-math}
\renewcommand{\leadsto}{\rightsquigarrow}

\begin{document}
\setmathfont{Latin Modern Math}% this is default
$\leadsto\rightarrow\Rightarrow$ 

\setmathfont{XITS Math}
$\leadsto\rightarrow\Rightarrow$ 

\setmathfont{STIX Math}
$\leadsto\rightarrow\Rightarrow$ 

\setmathfont{Cambria Math}
$\leadsto\rightarrow\Rightarrow$ 

\setmathfont{Asana Math}
$\leadsto\rightarrow\Rightarrow$
\end{document}

Maybe there is something that fits and you do not have to design your own symbol.

But in order to really help you, you will have to give us an MWE which shows your setup. I am guessing that it looks like this for you:

% arara: pdflatex

\documentclass{article}
\usepackage{amssymb}

\begin{document}
$\leadsto\rightsquigarrow\rightarrow\Rightarrow$ 
\end{document}

There is also $\leadsto$ from the package latexsym but that is not what you want, I fear.

You could also check http://www.fileformat.info/info/unicode/font/fontlist.htm?text=%E2%87%9D+-+Unicode+Character+%27RIGHTWARDS+SQUIGGLE+ARROW%27+%28U%2B21DD%29 in order to see, which fonts on your system do provide this symbol.

Related Solutions

[Tex/LaTex] How to create an Arrow Symbol

Using TikZ you can define a command that will give you a stretchable symbol; you can do something like this:

\documentclass{book}
\usepackage{tikz}

\newcommand\myarrow[1][1]{%
  \raisebox{-0.5cm}{\begin{tikzpicture}\draw (0,0) -- (#1,0); \draw[->] (#1,0) -- (#1,-0.5);\end{tikzpicture}}}

\begin{document}
\noindent\myarrow[6.4]
\begin{equation}
  x^n + y^n = z^n.
\end{equation}

\noindent\myarrow[4.8]
\begin{equation}
  a= b + c + d + e + f.
\end{equation}

\end{document}

enter image description here

[Tex/LaTex] How to create dashed right arrow over symbol

OK, this is far from being perfect, but in some sense there is no perfectness on the route my answer you linked to. The problem is this: when we use the dashed arrow from MnSymbol as the arrow tip of an extensible dashed arrow, this symbol defines the length of the dash as well as the gap between dashes. If you also want the extensible dashed arrow to have exactly the same length as one of the standard extensible arrows like \overrightarrow, we have to compromise somewhere as not always an integral multiple of the (fixed) dashed pattern will match. So we will have uneven spaces somewhere.

\documentclass{article}

\usepackage{graphicx}

\DeclareFontFamily{U}{MnSymbolA}{}
\DeclareSymbolFont{MnSyA}{U}{MnSymbolA}{m}{n}
\DeclareFontShape{U}{MnSymbolA}{m}{n}{
    <-6>  MnSymbolA5
   <6-7>  MnSymbolA6
   <7-8>  MnSymbolA7
   <8-9>  MnSymbolA8
   <9-10> MnSymbolA9
  <10-12> MnSymbolA10
  <12->   MnSymbolA12}{}
\DeclareMathSymbol{\dashedleftarrow}{\mathrel}{MnSyA}{98}
\DeclareMathSymbol{\dashedrightarrow}{\mathrel}{MnSyA}{96}

\def\Gg{{\mathbf{G}}}
\def\gc{{\mathbf{g}}}

\newcommand{\toright}[1]{\overrightarrow{#1}}
\newcommand{\toleft}[1]{\overleftarrow{#1}}

\newcommand{\torightleft}[1]{\toleft{\toright{#1}}}
\newcommand{\toprerightleft}[1]{\toleft{\topreright{#1}}}
\newcommand{\torightpreleft}[1]{\topreleft{\toright{#1}}}
\newcommand{\toprerightpreleft}[1]{\topreleft{\topreright{#1}}}

\newcommand{\toleftright}[1]{\toright{\toleft{#1}}}
\newcommand{\topreleftright}[1]{\toright{\topreleft{#1}}}
\newcommand{\toleftpreright}[1]{\topreright{\toleft{#1}}}
\newcommand{\topreleftpreright}[1]{\topreright{\topreleft{#1}}}

\makeatletter
\newcommand{\topreleft}[1]{%
  \vbox {\m@th\ialign{##\crcr
  \topreleftfill \crcr
  \noalign{\kern-\p@\nointerlineskip}
  $\hfil\displaystyle{#1}\hfil$\crcr}}}

\newcommand{\topreright}[1]{%
  \vbox {\m@th\ialign{##\crcr
  \toprerightfill \crcr
  \noalign{\kern-\p@\nointerlineskip}
  $\hfil\displaystyle{#1}\hfil$\crcr}}}

%% fill with (short) minus signs
\def\topreleftfill{%
  $\m@th%
  \dashedleftarrowtip%
  \mkern-1mu%
  \xleaders\hbox{$\mkern2mu\shortbar\mkern-1mu$}\hfill%
  \mkern1mu%
  \shortbar%
  \mkern0.5mu%
$}

\def\toprerightfill{%
  $\m@th%
  \mkern.5mu%
  \shortbar%
  \mkern-1mu%
  \xleaders\hbox{$\mkern2mu\shortbar\mkern-1mu$}\hfill%
  \mkern1mu%
  ‌\dashedrightarrowtip%
$}

%% put 4.0pt space above and 0.0pt below the tip
\def\dashedleftarrowtip{%
  \raisebox{\z@}[4.0pt][0.0pt]{$\mathord{\dashedleftarrow}$}}

\def\dashedrightarrowtip{%
  \raisebox{\z@}[4.0pt][0.0pt]{$\mathord{\dashedrightarrow}$}}

%% make the minus shorter to fit \dashedleftarrow
\def\shortbar{%
  \smash{\scalebox{0.4}[1.0]{$-$}}}
\makeatother

\begin{document}
Arrow over G should fit nicely into the brackets:
\[%
  \left[\toleft{\Gg}\right] = \left[ \topreleft{\Gg} \right]
  = \left[\toright{\Gg}\right] = \left[ \topreright{\Gg} \right].
\]

Dashed right arrow and left arrow should be of the same length and align:
\[%
  \toprerightleft{\gc} = \topreleftright{\gc} = \torightpreleft{\gc} = \toleftpreright{\gc} = \toprerightpreleft{\gc} = \topreleftpreright{\gc} = \torightleft{\gc} = \torightleft{[\gc]}
\]

Left and right arrow should align and have the same length:
\[%
  \toprerightpreleft{\gc} = \toprerightpreleft{\Gg}
\]

\bigskip

\[%
  \topreright{\topreleft{x}} \quad \topreright{\topreleft{ab}} \quad \topreright{\topreleft{abc}} \quad \topreright{\topreleft{abcd}} \quad \topreright{\topreleft{abcde}}
\]

\[%
  \topreleft{\topreright{x}} \quad \topreleft{\topreright{ab}} \quad \topreleft{\topreright{abc}} \quad \topreleft{\topreright{abcd}} \quad \topreleft{\topreright{abcde}}
\]
\end{document}

sample output

So there is still some perfectness to be desired. Since you wanted to know how to tweak the parameters, here is how it works. The vertical layout is determined by the arrow tips. The definition

\def\dashedleftarrowtip{%
  \raisebox{\z@}[4.0pt][0.0pt]{$\mathord{\dashedleftarrow}$}}

says that thre is no space (0.0pt) below the arrow tip, and 4.0pt above. That way you can position the arrows and determine their distance when they are stacked. This also influences the size of the \left[...\right] braces, as those encompass also the white space above the arrow.

The horizontal pattern is determined by

\def\topreleftfill{%
  $\m@th%
  \dashedleftarrowtip%
  \mkern-1mu%
  \xleaders\hbox{$\mkern2mu\shortbar\mkern-1mu$}\hfill%
  \mkern1mu%
  \shortbar%
  \mkern0.5mu%
$}

Here, \mkern1mu is a horizontal kerning space of length 1mu=1/18\quad. The \xleaders command fills as much space as possible (\hfill) with the pattern \hbox{$\mkern2mu\shortbar\mkern-1mu$}, where the remaining space that can not be filled with another box is evenly distributed before, after and in between the repeated boxes.

Best Answer

Related Solutions

[Tex/LaTex] How to create an Arrow Symbol

[Tex/LaTex] How to create dashed right arrow over symbol

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