Btukfyl

I'm trying to find (or create) a symbol that is like geq but with a dashed/dotted line under the inequality symbol. It should look like this:

Thanks in advance

Some dirty tricks with low level programming and picture mode.

documentclass{article}

usepackage{amsmath}

usepackage{pict2e,picture}



makeatletter

newcommand{dashedeq}[1]{mathrel{vphantom{geq}mathpalettedashed@eq{#1}}}

newcommand{dashed@eq}[2]{%

  vcenter{%

    offinterlineskip

    roundcap

    linethickness{1.2dimexprvariable@rule{#1}relax}%

    sboxz@{$m@th#1#2$}%

    setlength{unitlength}{dimexpr(wdz@-2dimexprdashed@eq@kern{#1})/8}%

    sboxtw@{begin{picture}(1,0)Line(0,0)(1,0)end{picture}}%

    ialign{%

      ##cr

      copyz@cr

      noalign{vskip 0.3htz@}

      kerndashed@eq@kern{#1}%

      copytw@hfilcopytw@hfilcopytw@hfilcopytw@

      kerndashed@eq@kern{#1}%

      cr

    }%

  }%

}

newcommand{dashed@eq@kern}[1]{%

  ifx#1displaystyle 0.12wdz@else

    ifx#1textstyle 0.12wdz@else

      ifx#1scriptstyle 0.14wdz@else

        0.16wdz@

  fififi

}

newcommand{variable@rule}[1]{%

  fontdimen8  

  ifx#1displaystyletextfont3else

    ifx#1textstyletextfont3else

      ifx#1scriptstylescriptfont3else

        scriptscriptfont3relax

  fififi

}

makeatother



DeclareRobustCommand{geqd}{dashedeq{>}}

DeclareRobustCommand{leqd}{dashedeq{<}}



begin{document}



$age bgeqd cleqd d$



$scriptstyle age bgeqd cleqd d$



$scriptscriptstyle age bgeqd cleqd d$



end{document}

WITH WHITE RULES

documentclass{article}

usepackage{stackengine,xcolor,scalerel}

defshp{shprulekern.6LMptkern.25pt}

defshprule{rule{.5LMpt}{1LMpt}}

defdashle{mathrel{ThisStyle{ensurestackMath{stackengine{%

  -.8LMpt}{SavedStylele}{scriptscriptstylecolor{white}%

  shpshpshpshprule}{U}{c}{F}{F}{S}}}}}

begin{document}

$a dashle b$



$scriptstyle a dashle b$



$scriptscriptstyle a dashle b$

end{document}

WITH WHITE DOTS

documentclass{article}

usepackage{stackengine,xcolor,scalerel}

defshp{.kern-1.9ptkern.9LMpt}

defdashle{mathrel{ThisStyle{ensurestackMath{stackengine{%

  dimexpr-.47pt+.02LMptrelax}{SavedStylele}{%

  scriptscriptstylecolor{white}shpshpshp.}{U}{c}{F}{F}{S}}}}}

begin{document}

$a dashle b$



$scriptstyle a dashle b$



$scriptscriptstyle a dashle b$

end{document}

I assume you have already tried detexify and are aware of How to look up a symbol or identify a math symbol or character?. I have not found your symbol by myself. You could either use a different symbol (https://ctan.org/pkg/unicode-math provides some symbols) or use various tools to construct your own.
Here is an quick and dirty solution which uses https://www.ctan.org/pkg/pgf to add some blank space to the geq symbol.

documentclass{memoir}

usepackage{tikz,xcolor,amsmath}

usetikzlibrary{calc}

newcommand{dashgeq}{tikz[baseline=(dashgeqanchor.base)]{

    node (dashgeqanchor) {$geq$}; 

    draw[color=white,line width=0.05em] 

        (dashgeqanchor.base) -- +(0,-0.25em) 

        ($(dashgeqanchor.base) + (0.175em,0)$) -- +(0,-0.25em) 

        ($(dashgeqanchor.base) - (0.175em,0)$) -- +(0,-0.25em); 

}}



begin{document}

begin{align*}

    6   &> 5\

    6   &dashgeq 5\

    6   &geq 5

end{align*}

tiny

begin{align*}

    6   &> 5\

    6   &dashgeq 5\

    6   &geq 5

end{align*}

huge

begin{align*}

    6   &> 5\

    6   &dashgeq 5\

    6   &geq 5

end{align*}

end{document}

Notes

• This version works on white background only.


• A savebox might be useful if the symbol is frequently used in the same size.


• The constants chosen in the code are just found by a simple heuristics and might not work well if you use other math fonts.


• Other ideas might be found in Create symbol out of given symbols with same line width.


• The two outer edges of the dashed line are round whereas the inner are not.

Here there is my spartan proposal.

documentclass{article}

usepackage{amssymb, amsmath,graphics}

usepackage{stackengine}

newcommandnewgeq[1]{stackunder[1.3pt]{$#1$}{{{hspace{.03cm}scalebox{0.4}mathunderscore} {hspace{-.1cm}scalebox{0.4}mathunderscore} {hspace{-.1cm}scalebox{0.4}mathunderscore}}}}

begin{document}



$newgeq{a>b}$

end{document}