[Tex/LaTex] \perp and \parallel with equal height

math-mode

I'm looking for a way to get symbols for perpendicular and parallel with an equal height. I want to use the symbols as a superscript to a function like

\Psi^{\perp/\parallel}

However, it looks kind of awkward since the two symbols are not displayed at the same height (the parallel sign is way larger). If I use

\scriptstyle\parallel

the symbols have approximately the same height but are not aligned properly in the vertical direction.

Update: I found out that

\Psi^{\perp/\raisebox{0.5pt}{$\scriptscriptstyle\parallel$}}(x)

produces what I'm looking for. Still this is kind of a hack and more consistent solution would be really appreciated.

Best Answer

I suggest you construct a symbol using vertical rules. One version that will adapt itself to different math modes is

\newcommand{\myparallel}{{\mkern3mu\vphantom{\perp}\vrule depth 0pt\mkern2mu\vrule depth 0pt\mkern3mu}}

which you can use as

\Psi^{\perp/\myparallel}

The height of the \vrule here automatically adjusts to the height of \perp, setting the depth to 0pt makes it fit with the base of that symbol too.

Related Solutions

[Tex/LaTex] XeLaTeX: lost \perp in Cambria math

The character in question is U+27C2, which doesn't exist in Cambria Math. In this case you should use \mathrel\bot instead (the \mathrel is necessary to get the spacing right).

As a long-term solution we should implement fall-back characters in unicode-math. U+27C2 is intended for the perpendicular relation as indicated by Unicode; MathML, on the other hand, suggests to use U+22A5 for that purpose. Currently \perp is hard-wired to map to U+27C2, and \bot maps to U+22A5. The correct solution would be to have \perp map to U+22A5 if U+27C2 is not available. I'll add that to the issue tracker, but I have no time to look after it during the next couple of weeks.

[Tex/LaTex] automatic \allowbreak around mathbin and mathrel characters

The flexisym package allows arbitrary commands to be inserted into math character definitions. It is usually used in conjunction with breqn for which it was written but here I use it directly. the definition of binary and relation functions are a bit opaque but just copied directly from the existing definition with the addition of \allowbreak as in your example, but applied to all characters of those classes (as long as they are defined via the standard LaTeX declarations).

enter image description here

\documentclass{article}

\usepackage{flexisym}

\begingroup
\catcode`\_11
\catcode`\:11
\gdef\math_bsym_Bin:Nn#1#2{%
 \allowbreak\math_char:NNn 2#1{#2}\allowbreak}
\gdef\math_bsym_Rel:Nn#1#2{%
 \allowbreak\math_char:NNn 3#1{#2}\allowbreak}
\endgroup

\begin{document}


text text text text text text text text text text text text \(x + x + x + x + x + x + x + x + x\)

i text text text text text text text text text text text text \(x + x + x + x + x + x + x + x + x\)

text text text text text text text text text text text text \(x + x + x + x + x + x + x + x + x\)

text text text text text text text text text text text text \(x = x = x = x = x = x = x = x = x\)

text text text text text text text text text text text text \(x = x = x = x = x = x = x = x = x\)

\end{document}

Best Answer

Related Solutions

[Tex/LaTex] XeLaTeX: lost \perp in Cambria math

[Tex/LaTex] automatic \allowbreak around mathbin and mathrel characters

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