Is there a way in latex to change the vertical thickness (height) of the line generated by the \overline command?
\[
\overline{\overline{A \vee B}} = \overline{\overline{A} \wedge \overline{B}}
\]
[Tex/LaTex] Overline thickness
math-moderules
Related Solutions
The footnote rule should take no space on the page. That's the purpose of
\kern -3pt
\hrule width 2in
\kern 2.6pt
First of all TeX backs up vertically by 3pt, then prints the rule (which is by default 0.4pt thick) and then skips by 2.6pt: the total is zero.
So a correct redefinition would be
\renewcommand{\footnoterule}{%
\kern -3pt
\hrule width \textwidth height 1pt
\kern 2pt
}
Instead of \textwidth one can also put an explicit dimension. The rule height added to the positive kern after the rule should give the negative of the back up amount preceding the rule.
One should note that the amount of skipping down gives the separation between the rule and the footnote text. With this definition the rule will be at 2pt + height of strut from the baseline of the footnote's first line. Before the rule there's a vertical skip measured by \skip\footins, whose default value is 9pt plus 4pt minus 2pt. With the 3pt back up, the space between the text and the footnote rule will be at least 4pt and at most 10pt.
Jan Tschichold frowned upon footnote rules: he said that there should be none at all or it must occupy the entire text width.
A tcbox from tcolorbox could be a solution
\documentclass{article}
\usepackage{lmodern}
\usepackage{tcolorbox}
\newtcbox{\upbox}[2][black]{on line,
arc=0pt,
outer arc=0pt,
colback=white,
colframe=#1,
boxsep=0pt, left=1pt, right=1pt, top=2pt, boxrule=0pt, toprule=1pt,#2}
\begin{document}
This are \upbox{}{some} words with \upbox[red]{toprule=3pt}{a line on top}
\end{document}
Best Answer
TeX
The default rule thickness θ is 0.4pt in TeX. An
\overlineformula is set as\vbox:θ is taken from fontdimen 8 of math font family 3. Example:
As can be seen, also the gap between the line and the formula changes with the thickness of the line (even with factor 3).
LuaTeX/LuaLaTeX
LuaTeX makes the parameters configurable:
\Umathoverbarkern: the white space above the line\Umathoverbarrule: line thickness\Umathoverbarvgap: the gap between the line and the formulaThese values can be set for all eight math styles. LuaTeX also makes the cramped styles available as:
\crampeddisplaystyle\crampedtextstyle\crampedscriptstyle\crampedscriptscriptstyleIn cramped styles, used for formulas below bars (
\overline,\sqrt, denominator in fractions), the exponents are set lower than usual.LuaLaTeX adds a prefix
luatexto LuaTeX's new primitives (to avoid name clashes). The following example sets\Umathoverbarrulein all eight styles: