使用 newtxmath 来表示字母而不是符号

Question 1

首先提供一个粗略的解决方案，然后我会尝试说服你一个更现代的解决方案。

比我最初发布的修复方法更好，更简单。 用重新调整运算符\scalebox。

\documentclass[12pt,varwidth]{standalone}

\usepackage{amssymb}
\usepackage[noamssymbols]{newtxmath}
\usepackage{graphicx}

\let\oldlnsim\lnsim
\renewcommand{\lnsim}{\ensuremath\mathrel{\scalebox{0.8}{\ensuremath\oldlnsim}}}

\let\oldlesssim\lesssim
\renewcommand{\lesssim}{\ensuremath\mathrel{\scalebox{0.8}{\ensuremath\oldlesssim}}}

%% Etc.

\begin{document}
$a\lnsim b$ means $a<b$ and $a\nsim b$.

I'd like $a\lnsim b$ and $a\lesssim b$ to look different.

But also $\lnsim$ to be same size as $\le,\nsim,\ne,=$.
\end{document}

逐像素比较。之前：

后：

好吧，这是我说过要尝试说服您的另一个解决方案。

如果您阅读newtx文档，您会发现作者 Michael Sharpe 非常坦诚地说明了他从哪里获得了这个软件包的零碎部分。他甚至说：“在我看来，Linux Libertine 中的材料排版比 Times 中相应的材料排版看起来更好。”因此，如果您喜欢他的设置，我们也可以在现代工具链中请求它们并获得其所有好处。包括自动缩放的字体、对数学字母表没有限制，以及从任何 Unicode 字体中选择任何字形作为默认字形的能力。

\documentclass[12pt,varwidth]{standalone}

\usepackage{amssymb}
\usepackage[math-style=TeX]{unicode-math}

%% Basically identical appearance to newtxmath, but all scaling is now
%% automatic.
\defaultfontfeatures{Scale=MatchLowercase}
\setmainfont{Linux Libertine O}
\setsansfont{TeX Gyre Heros}
\setmathfont{TeX Gyre Termes Math}

%% With one wrinkle: Unicode maps /mathcal and /mathscr to the same
%% code points, so we need to set /mathcal and /mathbfcal up
%% separately:  Now we have more alphabets than before, and won’t
%% run out.
\setmathfont[range={\mathcal,\mathbfcal},StylisticSet=1,Scale=MatchUppercase]{XITS Math}

\begin{document}
$a\lnsim b$ means $a<b$ and $a\nsim b$.

I'd like $a\lnsim b$ and $a\lesssim b$ to look different.

But also $\lnsim$ to be same size as $\le,\nsim,\ne,=$.

\end{document}

这很简单，并且会得到一个比更独特的运算符newtxmath。不过，要真正得到你想要的东西，即amsmath缩小符号，需要一些额外的技巧：

\documentclass[12pt,varwidth]{standalone}

\usepackage{amssymb}
\usepackage[math-style=TeX]{unicode-math}

%% Basically identical appearance to newtxmath, but all scaling is now
%% automatic.
\defaultfontfeatures{Scale=MatchLowercase}
\setmainfont{Linux Libertine O}
\setsansfont{TeX Gyre Heros}
\setmathfont{TeX Gyre Termes Math}

%% With one wrinkle: Unicode maps /mathcal and /mathscr to the same
%% code points, so we need to set /mathcal and /mathbfcal up
%% separately:  Now we have more alphabets than before, and won’t
%% run out.
\setmathfont[range={\mathcal,\mathbfcal},StylisticSet=1,Scale=MatchUppercase]{XITS Math}

%% We can use the same trick to override any range of math characters---
%% such as the ones whose appearance you didn’t like.  In this case,
%% you wanted them to look
%% like amsmath’s, but smaller.
\setmathfont[range={"22E6-"22E9},Scale=0.8]{XITS Math}
%% Since ≁ now looks out of place, change it, then change a number of
%% other tilde operators to match that:
\setmathfont[range={"223B-"223D,"2241-"224C}]{XITS Math}

\begin{document}
$a\lnsim b$ means $a<b$ and $a\nsim b$.

I'd like $a\lnsim b$ and $a\lesssim b$ to look different.

But also $\lnsim$ to be same size as $\le,\nsim,\ne,=$.

\end{document}

Answer