如何使 \mathaccent 变得低沉和尖锐？

Question

我试图发出宽大的重音和尖音。以下\widetilde是\widehat教科书和https://texwelt.de/fragen/26664/breiter-gravis-fur-pdflatex/26908，我继续说

\documentclass{article}
\pagestyle{empty}
\usepackage{graphicx}
\usepackage[T1]{fontenc}%%% we do wish this if we stick to pdflatex
\usepackage{newtxtext}%%% we do wish this if we stick to pdflatex
\usepackage[slantedGreek,subscriptcorrection]{newtxmath}%%% we do wish if we stick to pdflatex
\newcommand{\widegraveA}{\mathaccent"0012 }
\newcommand{\wideacuteA}{\mathaccent"0013 }
\makeatletter
\newcommand\wideacuteB[1]{%
  \mathchoice
  {\@wideaccent{\displaystyle}{#1}{\mathchar"7013}{-1.06ex}{1}{1}}
  {\@wideaccent{\textstyle}{#1}{\mathchar"7013}{-1.05ex}{1}{1}}
  {\@wideaccent{\scriptstyle}{#1}{\mathchar"7013}{-.75ex}{1}{1}}
  {\@wideaccent{\scriptscriptstyle}{#1}{\mathchar"7013}{-.54ex}{1}{1}}
}
\newcommand\widegraveB[1]{%
  \mathchoice
  {\@wideaccent{\displaystyle}{#1}{\mathchar"7012}{-1.06ex}{1}{1}}
  {\@wideaccent{\textstyle}{#1}{\mathchar"7012}{-1.05ex}{1}{1}}
  {\@wideaccent{\scriptstyle}{#1}{\mathchar"7012}{-.75ex}{1}{1}}
  {\@wideaccent{\scriptscriptstyle}{#1}{\mathchar"7012}{-.54ex}{1}{1}}
}
\newcommand{\@wideaccent}[6]{
  \setbox\@tempboxa\hbox{$\m@th#1#2$}%
  \@tempdima=\ht\@tempboxa
  \@tempdimb=\wd\@tempboxa
  \ooalign{%
    \box\@tempboxa\cr
    \hidewidth\raise\dimexpr\@tempdima#4\relax\hbox{\resizebox{#5\@tempdimb}{#6\height}{$\m@th#1#3$}}\hidewidth
  }%
}
\makeatother
\begin{document}
 \(\widegraveA{\mathit{loop}}, \widegraveA{\mathit{pool}}, \widegraveA{\mathit{buffer}}, \widegraveA{\sigma_k}, \wideacuteA{\mathit{loop}}, \wideacuteA{\mathit{pool}}, \wideacuteA{\mathit{buffer}}, \wideacuteA{\sigma_k}\)\\
 \(\widegraveB{\mathit{loop}}, \widegraveB{\mathit{pool}}, \widegraveB{\mathit{buffer}}, \widegraveB{\sigma_k}, \wideacuteB{\mathit{loop}}, \wideacuteB{\mathit{pool}}, \wideacuteB{\mathit{buffer}}, \wideacuteB{\sigma_k}\)
\end{document}

如您所见，根本不要拉长重音符和锐音符，并且\wideacuteA有时会产生不居中的重音符，太左、太右、太窄、太靠近文本或太远离文本的重音符：\widegraveA\wideacuteB\widegraveB

1. 为什么？

2. 如何使\mathaccent重音更加突出？

3. 如何制作\widegraveB和\wideacuteB产生不丑陋（或至少不那么丑陋）的口音？

PS。在这个特定问题中，我们确实希望使用具有给定选项的 T1 和 NewTX 字体。此外，宽锐音符和重音符下的文本的优先顺序如下，从最重要到最不重要：

1. \sigma_k，
2. \mathit{buffer}，
3. \mathit{loop}和\mathit{pool}，
4. \mathit{sum}，
5. 所有其他多字母数学。

我们处理unicode引擎TeX Gyre Termes 和 TeX Gyre Termes Math 的宽锐角和宽坟墓。

Answer 1

在这里，我修改了我的答案非常宽的帽子符号，甚至让它在 中工作\scriptstyle。

已编辑/修改以便工作更好的在较小的脚本中。

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{scalerel,stackengine}
\stackMath
\newcommand\reallywideacute[1]{%
  \ThisStyle{\savestack\tmpA{$\SavedStyle#1$}%
  \savestack{\tmpbox}{%
    \def\scriptstyleScaleFactor{0.8}% LOCAL CHANGE
    \def\scriptscriptstyleScaleFactor{0.68}% LOCAL CHANGE
    $\SavedStyle\stretchto{%
    \scalerel*[\wd\tmpAcontent]%
      {\kern-2.05\LMpt\mathchar"7013\kern-1.1\LMpt}%
    {\rule{0ex}{\textheight}}%
  }{2.6\LMex}$}%
  \stackengine{-7.5\LMpt}{\SavedStyle#1}{\tmpbox}{O}{c}{F}{T}{S}}%
}
\newcommand\reallywidegrave[1]{%
  \ThisStyle{\savestack\tmpA{$\SavedStyle#1$}%
  \savestack{\tmpbox}{%
    \def\scriptstyleScaleFactor{0.8}% LOCAL CHANGE
    \def\scriptscriptstyleScaleFactor{0.68}% LOCAL CHANGE
    $\SavedStyle\stretchto{%
    \scalerel*[\wd\tmpAcontent]%
      {\kern-1.1\LMpt\mathchar"7012\kern-2.1\LMpt}%
    {\rule{0ex}{\textheight}}%
  }{2.6\LMex}$}%
  \stackengine{-7.5\LMpt}{\SavedStyle#1}{\tmpbox}{O}{c}{F}{T}{S}}%
}
\def\scriptstyleScaleFactor{0.8}% GLOBAL CHANGE, 0.7 DEFAULT
\def\scriptscriptstyleScaleFactor{0.68}% GLOBAL CHANGE, 0.5 DEFAULT
\parskip 1ex
\begin{document}

$\reallywideacute{zbcdefghijklm}\quad\reallywidegrave{zbcdefghijklm}$

$\reallywideacute{zbcdefghijk}\quad\reallywidegrave{zbcdefghijk}$

$\reallywideacute{zbcdefghi}\quad\reallywidegrave{zbcdefghi}$

$\reallywideacute{zbcdefg}\quad\reallywidegrave{zbcdefg}$

$\reallywideacute{zbcde}\quad\reallywidegrave{zbcde}$

$\reallywideacute{zbc}\quad\reallywidegrave{zbc}$

$\reallywideacute{zb}\quad\reallywidegrave{zb}$

$\scriptstyle
 \reallywideacute{zbcdefghijklm}\quad\reallywidegrave{zbcdefghijklm}$

$\scriptstyle
 \reallywideacute{zbcdefghijk}\quad\reallywidegrave{zbcdefghijk}$

$\scriptstyle
 \reallywideacute{zbcdefghi}\quad\reallywidegrave{zbcdefghi}$

$\scriptstyle
 \reallywideacute{zbcdefg}\quad\reallywidegrave{zbcdefg}$

$\scriptstyle
 \reallywideacute{zbcde}\quad\reallywidegrave{zbcde}$

$\scriptstyle
 \reallywideacute{zbc}\quad\reallywidegrave{zbc}$

$\scriptstyle
 \reallywideacute{zb}\quad\reallywidegrave{zb}$

\end{document}

在 中\scriptscriptstyle，它仍然是可以通过的：

---

补充

要使用newtxmath，需要调整字距：

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{newtxtext, newtxmath}
\usepackage{scalerel,stackengine}
\stackMath
\newcommand\reallywideacute[1]{%
  \ThisStyle{\savestack\tmpA{$\SavedStyle#1$}%
  \savestack{\tmpbox}{$\SavedStyle\stretchto{%
    \scalerel*[\wd\tmpAcontent]%
      {\kern-.95\LMpt\mathchar"7013\kern-.12\LMpt}%
    {\rule{0ex}{\textheight}}%
  }{2.6\LMex}$}%
  \stackengine{-7.5\LMpt}{\SavedStyle#1}{\tmpbox}{O}{c}{F}{T}{S}}%
}
\newcommand\reallywidegrave[1]{%
  \ThisStyle{\savestack\tmpA{$\SavedStyle#1$}%
  \savestack{\tmpbox}{$\SavedStyle\stretchto{%
    \scalerel*[\wd\tmpAcontent]%
      {\kern-.12\LMpt\mathchar"7012\kern-.95\LMpt}%
    {\rule{0ex}{\textheight}}%
  }{2.6\LMex}$}%
  \stackengine{-7.5\LMpt}{\SavedStyle#1}{\tmpbox}{O}{c}{F}{T}{S}}%
}
\parskip 1ex
\begin{document}

$\reallywideacute{zbcdefghijklm}\quad\reallywidegrave{zbcdefghijklm}$

$\reallywideacute{zbcdefghijk}\quad\reallywidegrave{zbcdefghijk}$

$\reallywideacute{zbcdefghi}\quad\reallywidegrave{zbcdefghi}$

$\reallywideacute{zbcdefg}\quad\reallywidegrave{zbcdefg}$

$\reallywideacute{zbcde}\quad\reallywidegrave{zbcde}$

$\reallywideacute{zbc}\quad\reallywidegrave{zbc}$

$\reallywideacute{zb}\quad\reallywidegrave{zb}$

$\scriptstyle
 \reallywideacute{zbcdefghijklm}\quad\reallywidegrave{zbcdefghijklm}$

$\scriptstyle
 \reallywideacute{zbcdefghijk}\quad\reallywidegrave{zbcdefghijk}$

$\scriptstyle
 \reallywideacute{zbcdefghi}\quad\reallywidegrave{zbcdefghi}$

$\scriptstyle
 \reallywideacute{zbcdefg}\quad\reallywidegrave{zbcdefg}$

$\scriptstyle
 \reallywideacute{zbcde}\quad\reallywidegrave{zbcde}$

$\scriptstyle
 \reallywideacute{zbc}\quad\reallywidegrave{zbc}$

$\scriptstyle
 \reallywideacute{zb}\quad\reallywidegrave{zb}$

\end{document}