Csdrhrt

I am trying to make a large unary operator from an equal sign =, namely, mathlarger{boldsymbol{=}}, but the bars are too close together to distinguish from the general binary case. Is there some package with = having a wider gap that I can use?

Another proposal. The optimal vertical spacing might depend on the used font and on personal taste.

documentclass{article}



usepackage{amsmath}



newcommand*{uneq}{{mathpaletteuneqauxrelax}}

newcommand*{uneqaux}[2]{%

  setbox0=hbox{mathsurround=0pt$#1boldsymbol{-}$}%

  raise.25ht0copy0 kern-wd0 lower.2ht0box0

}



begin{document}

${=}A$



$uneq A$

$scriptstyleuneq A$

$scriptscriptstyleuneq A$

end{document}

Here's a proposal:

documentclass{article}

usepackage{amsmath,xparse}



ExplSyntaxOn

NewDocumentCommand{uneq}{}

 {

  mathbin{mathpaletteupdraft_uneq:nn {}}

 }



dim_new:N l__updraft_width_dim

dim_new:N l__updraft_height_dim



cs_new_protected:Nn updraft_uneq:nn

 {

  vcenter

   {

    mathsurround=0pt

    hbox:n

     {

      % measure the width of the equals sign in the current style

      hbox_set:Nn l_tmpa_box {$#1{=}$}

      dim_set:Nn l__updraft_width_dim { box_wd:N l_tmpa_box }

      % measure the width of 1mu in the current style

      hbox_set:Nn l_tmpa_box {$#1mkern1mu$}

      dim_set:Nn l__updraft_height_dim { box_wd:N l_tmpa_box }

      % start drawing

      driver_draw_begin:

      % round caps on lines

      driver_draw_cap_round:

      % set the line width (change 1.2 to your liking)

      driver_draw_linewidth:n { 1.2l__updraft_height_dim }

      % 1. cm fonts use width/10  of side bearings

      % 2. the gap between lines is 5 times the line width

      % bottom line

      driver_draw_moveto:nn

       { 0.1 l__updraft_width_dim }

       { -2.5 l__updraft_height_dim }

      driver_draw_lineto:nn

       { 0.9 l__updraft_width_dim }

       { -2.5 l__updraft_height_dim }

      driver_draw_stroke:

      % top line

      driver_draw_moveto:nn

       { 0.1 l__updraft_width_dim }

       { 2.5 l__updraft_height_dim }

      driver_draw_lineto:nn

       { 0.9 l__updraft_width_dim }

       { 2.5 l__updraft_height_dim }

      driver_draw_stroke:

      driver_draw_end:

      % occupy the space

      hspace{ l__updraft_width_dim }

     }

   }

 }

ExplSyntaxOff



begin{document}



$mathbin{=}A$



$uneq A$ $scriptstyleuneq A$ $scriptscriptstyleuneq A$



$A=B$



end{document}

There is no “unary operator” class, one has to use mathbin and TeX will act according to the context. You could also decide to simply use mathord.

The gap can be tweaked by changing the 4LMpt.

documentclass{article}

usepackage{scalerel,stackengine,bm}

newcommandbineq{mathbin{ThisStyle{ensurestackMath{vcenter{hbox{stackengine{%

  4LMpt}{SavedStylebm{-}}{SavedStylebm{-}}{O}{c}{F}{F}{L}}}}}}}

begin{document}

${bm{=}} Aquadscriptstyle{bm{=}} Aquadscriptscriptstyle{bm{=}} A$ bold =



$bineq Aquadscriptstylebineq Aquadscriptscriptstylebineq A$ verb|bineq|

end{document}