These symbols are like arrow, except the arrow heads are inverted. Some ASCII art: >-- or --<

Could you help?


I couldn't find any existing symbols. But, one option would be to use tikz to draw them:

enter image description here



\newcommand{\toReversed}{\mathrel{\tikz [x=1.4ex,y=1.4ex,line width=.14ex, baseline] {\draw (0,0.5) -- (1,0.5); \draw [<-] (0.95,0.5) -- (1,0.5);}}}%
\newcommand{\fromReversed}{\mathrel{\tikz [x=1.4ex,y=1.4ex,line width=.14ex, baseline] {\draw (0,0.5) -- (1,0.5); \draw [<-] (0.05,0.5) -- (0,0.5);}}}%

$A \toReversed B \fromReversed C$
  • I really need to learn tikz properly... – user89 Apr 30 '14 at 5:39

They are \righttail and \lefttail with unicode-math, U291A and U+2919. No math font for pdflatex provides them, as far as I know, except for the STIX fonts.

If you have them, you can import the symbols; not really compatible with the standard arrows, but not too distant either.


%% from stix.sty (with slight changes)

\DeclareMathSymbol{\lefttail}    {\mathrel}{arrows2}{"B2}
\DeclareMathSymbol{\righttail}   {\mathrel}{arrows2}{"B3}
\DeclareMathSymbol{\leftdbltail} {\mathrel}{arrows2}{"B4}

$A\lefttail B \righttail C \rightarrow D$

$A\leftdbltail B \rightdbltail C$

enter image description here

With unicode-math


\setmathfont{Latin Modern Math}
\setmathfont[range={\lefttail,\righttail,\leftdbltail,\rightdbltail}]{XITS Math}

$A\lefttail B \righttail C \rightarrow D$

$A\leftdbltail B \rightdbltail C$

Also Asana Math has the symbols. Unfortunately they are missing from Latin Modern Math and the other TeX Gyre math fonts, that is, Termes and Pagella.

  • What are the advantages of this solution over the tikz solution (the currently accepted answer)? – user89 May 1 '14 at 3:00
  • 1
    @user89 None; I just wanted to point to a different possibility. – egreg May 1 '14 at 8:11
  • @user89: TikZ renderings can only be copy+pasted as graphics, not as text. This answer makes a document with text arrows that will correctly copy+paste. – Ben Voigt Sep 13 '18 at 16:17

This approach builds it from existing characters, in a manner that tries to mimic the style of the default arrowheads.

$A \righttail C \rightarrow D$

$A \leftarrow C \lefttail B$

enter image description here

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