How can I write this type of convergent notation in LaTeX?

Question

How can I write this notation in LaTeX?

What is the meaning of this notation? – projetmbc Nov 25 '20 at 08:09 — projetmbc, Nov 25 '20 at 08:09

score 13 · Accepted Answer · answered Nov 24 '20 at 06:38

13

You can construct this symbol using a mixture of \angle (from amssymb) and \longrightarrow together with a combination of \ooalign and \mathpalette.

\documentclass{article}
\usepackage{amssymb}
\makeatletter
\newcommand{\angleto}{\mathpalette\angleto@\relax}
\newcommand{\angleto@}[2]{\mathrel{\ooalign{$#1\hidewidth\angle\hidewidth$\cr$#1\longrightarrow$}}}
\makeatother
\begin{document}
$z \angleto \zeta_{z \angleto \zeta_{z \angleto \zeta}}$
\end{document}

answered Nov 24 '20 at 06:38

Werner

603,163

1

Can you explain à little the meaning of \angleto@ ? – projetmbc Nov 25 '20 at 08:08
@projetmbc: \mathpalette takes two arguments and I need that to allow different sizes of operators within different styles, so I had to create an intermediary macro to handle the use of \mathpalette. – Werner Nov 25 '20 at 17:36

Roland · Answer 2 · 2020-11-24T06:50:07.523

5

Like that:

\documentclass{article}
\usepackage{mathtools}
\begin{document}
$z\mathrel{\rlap{\;\angle}{\longrightarrow}}\zeta\lowercase{o}$


\end{document}

edited Nov 24 '20 at 06:50

answered Nov 24 '20 at 06:38

Roland

6,655

score 5 · Answer 3 · answered Nov 24 '20 at 11:50

A sixty degree angle:

\documentclass{article}
\usepackage{amsmath,pict2e}
\makeatletter
\newcommand{\angledto}{\mathrel{\mathpalette\angled@arrow\longrightarrow}}
\newcommand{\angledgets}{\mathrel{\mathpalette\angled@arrow\longleftarrow}}
\newcommand{\angled@arrow}[2]{%
  \vphantom{#1\rightarrow}%
  \ooalign{\hidewidth\angled@angle{#1}\hidewidth\cr$\m@th#1#2$\cr}%
}
\newcommand{\angled@angle}[1]{%
  $\m@th#1\vcenter{\hbox{%
    \sbox\z@{$#1\mathstrut$}%
    \setlength{\unitlength}{0.5\dimexpr\ht\z@+\dp\z@}% adjust the factor
    \begin{picture}(1.1547,1)
    \roundcap
    \roundjoin
    \Line(0.57735,1)(0,0)(1.1547,0)
    \end{picture}%
  }}$%
}
\makeatother
\begin{document}
[
z\angledto \zeta_0
]
[
\scriptstyle z\angledto \zeta_0
]
[
\scriptscriptstyle z\angledto \zeta_0
]
\end{document}

Here's with \angledgets

It wouldn't be difficult to reverse the angle, if requested.

How can I write this type of convergent notation in LaTeX?

3 Answers3