\leq我在使用 LuaLaTeX替换时遇到了问题\leqslant（使用 PdfLaTeX 时没有遇到这个问题）。
以下是 MWE：
\documentclass[10pt,a4paper,french]{article}
\usepackage{mathtools}
\usepackage{babel}
\usepackage[warnings-off={mathtools-colon,mathtools-overbracket},math-style=french]{unicode-math}
\usepackage[default]{fontsetup}
\usepackage[scale={0.75,0.8},footskip=1.5cm,heightrounded]{geometry}
\RenewDocumentCommand{\leq}{}{\leqslant}%modification du <=
\begin{document}
\[x\leq 3\]
\end{document}
以下是我得到的结果：
<= 符号没有改变。
但是，如果我输入：
\documentclass[10pt,a4paper,french]{article}
\usepackage{mathtools}
\usepackage{babel}
\usepackage[warnings-off={mathtools-colon,mathtools-overbracket},math-style=french]{unicode-math}
\usepackage[default]{fontsetup}
\usepackage[scale={0.75,0.8},footskip=1.5cm,heightrounded]{geometry}
\RenewDocumentCommand{\le}{}{\leqslant}%modification du <=
\begin{document}
\[x\le 3\]
\end{document}
以下是我得到的结果：
我不明白，因为我认为\le和\leq完全一样。而且在我的所有文档（有很多）中，我都使用了\leq。
答案1
您可能希望所有不等式都使用倾斜变体，逐个重新定义它们可能很繁琐。许多 Unicode 数学字体都有一次性完成所有操作的选项（这些选项称为“样式集”）。不幸的是，NewComputerModern您使用的默认字体没有此功能。您可以建议维护者添加它或切换到其他字体。
字体示例Erewhon：
\documentclass[10pt,a4paper,french]{article}
\usepackage{mathtools}
\usepackage{babel}
\usepackage[warnings-off={mathtools-colon,mathtools-overbracket},
math-style=french]{unicode-math}
\usepackage[StylisticSet=4]{fourier-otf}
%\usepackage[Style=leqslant]{fourier-otf}% Same output
\usepackage[scale={0.75,0.8},footskip=1.5cm,heightrounded]{geometry}
\begin{document}
\[x\leq 3, y\leqq 4, z\ngeq 5, t\eqless 6\]
\begin{document}
将打印
答案2
Unicode 对 ≤ 和 ⩽ 有不同的代码点
≤ U+2264 小于或等于
⩽ U+2A7D 小于或倾斜等于
其他相关符号也类似。
如果你这样做\ShowCommand{\le}，\begin{document}你会看到
> \le=\protected macro:
->\leq .
和\ShowCommand{\leq}你一起得到
> \leq=the character ≤.
并\ShowCommand{\leqslant}得到
> \leq=the character ⩽.
你应该这样做
\documentclass[10pt,a4paper,french]{article}
\usepackage{mathtools}
\usepackage{babel}
\usepackage[
warnings-off={mathtools-colon,mathtools-overbracket},
math-style=french
]{unicode-math}
\usepackage[default]{fontsetup}
\usepackage[scale={0.75,0.8},footskip=1.5cm,heightrounded]{geometry}
\AtBeginDocument{%
\RenewCommandCopy{\leq}{\leqslant}%
\RenewCommandCopy{\le}{\leq}%
}
\begin{document}
\[x\leq 3 \qquad x \le 3\]
\end{document}
\geq您还需要对和\ge以及需要倾斜的其他不等式符号执行类似操作。
从 开始unicode-math-table，但并非所有带有斜线的符号都有不带斜线的对应符号。
\UnicodeMathSymbol{"02A7D}{\leqslant }{\mathrel}{less-than or slanted equal to}%
\UnicodeMathSymbol{"02A7E}{\geqslant }{\mathrel}{greater-than or slanted equal to}%
\UnicodeMathSymbol{"02A7F}{\lesdot }{\mathrel}{less-than or slanted equal to with dot inside}%
\UnicodeMathSymbol{"02A80}{\gesdot }{\mathrel}{greater-than or slanted equal to with dot inside}%
\UnicodeMathSymbol{"02A81}{\lesdoto }{\mathrel}{less-than or slanted equal to with dot above}%
\UnicodeMathSymbol{"02A82}{\gesdoto }{\mathrel}{greater-than or slanted equal to with dot above}%
\UnicodeMathSymbol{"02A83}{\lesdotor }{\mathrel}{less-than or slanted equal to with dot above right}%
\UnicodeMathSymbol{"02A84}{\gesdotol }{\mathrel}{greater-than or slanted equal to with dot above left}%
\UnicodeMathSymbol{"02A93}{\lesges }{\mathrel}{less-than above slanted equal abov
e greater-than above slanted equal}%
\UnicodeMathSymbol{"02A94}{\gesles }{\mathrel}{greater-than above slanted equal a
bove less-than above slanted equal}%
\UnicodeMathSymbol{"02A95}{\eqslantless }{\mathrel}{slanted equal to or less-than}%
\UnicodeMathSymbol{"02A96}{\eqslantgtr }{\mathrel}{slanted equal to or greater-than}%
\UnicodeMathSymbol{"02A97}{\elsdot }{\mathrel}{slanted equal to or less-than with
dot inside}%
\UnicodeMathSymbol{"02A98}{\egsdot }{\mathrel}{slanted equal to or greater-than w
ith dot inside}%
\UnicodeMathSymbol{"02A9B}{\eqqslantless }{\mathrel}{double-line slanted equal to or le
ss-than}%
\UnicodeMathSymbol{"02A9C}{\eqqslantgtr }{\mathrel}{double-line slanted equal to or gr
eater-than}%
\UnicodeMathSymbol{"02AA8}{\lescc }{\mathrel}{less-than closed by curve above slanted equal}%
\UnicodeMathSymbol{"02AA9}{\gescc }{\mathrel}{greater-than closed by curve above slanted equal}%
\UnicodeMathSymbol{"02AF9}{\leqqslant }{\mathrel}{double-line slanted less-than or equal to}%
\UnicodeMathSymbol{"02AFA}{\geqqslant }{\mathrel}{double-line slanted greater-than or equal to}%
答案3
Lua 代码可以在字体级别工作：定义您自己的自定义字体功能，包括字形替换。
平均能量损失
\documentclass{article}
\directlua{
fonts.handlers.otf.addfeature {
name = "leqs",
type = "substitution",
data = {
["≤"] = "uni2A7D",
}
}
}
\usepackage{unicode-math}
\setmathfont{texgyretermes-math.otf}[RawFeature=+leqs]
\begin{document}
\[ x \leq 3 \]
\end{document}
编辑
为了在 Lua 中实现更完整的查找表，定义自定义替代样式字体功能。
请注意，字体 TeX Gyre Termes - Math 缺少一些字形。
平均能量损失
\documentclass{article}
\usepackage{xcolor}
\usepackage{tabularray}
\usepackage{unicode-math}
\directlua{
fonts.handlers.otf.addfeature{
name = "saltineq",
type = "alternate",
data =
{
["≤"] = "⩽", %-- \leqslant
["≥"] = "⩾", %-- \geqslant
["⋜"] = "⪕", %-- \eqslantless
["⋝"] = "⪖", %-- \eqslantgtr
["⪙"] = "⪛", %-- \eqqslantless
["⪚"] = "⪜", %-- \eqqslantgtr
["≦"] = "⫹", %-- \leqqslant
["≧"] = "⫺", %-- \geqqslant
},
}
}
\setmainfont[
RawFeature={+saltineq},
]{XITS-Regular.otf}
\setmathfont{texgyretermes-math.otf}[
% RawFeature={+saltineq},
]
\ExplSyntaxOn
% Adapted from:
%https://tex.stackexchange.com/questions/654839/how-to-detect-if-a-unicode-character-has-been-defined
\NewDocumentCommand{\cg} { m }
{
\wb_checkunicode:nnn { #1 } { #1 } {
{\color{red}
\textrm{
#1
}
}}
}
\cs_new_protected:Nn \wb_checkunicode:nnn
{
\cs_if_exist:cTF { u8:\tl_to_str:n { #1 } } { #2 } { #3 }
}
\ExplSyntaxOff
\begin{document}
\addfontfeature{RawFeature={-saltineq}}
\begin{longtblr}[caption={Without feature},
remark{Note}={Text = XITS; Math = TeX Gyre Termes - Math.},
]{
colspec={Q[r]Q[c]Q[c]Q[c]Q[c]Q[l]},
cell{2-Z}{1,6}={font=\ttfamily,cmd={\textbackslash}},
column{3,4}={mode=imath},
column{3}={fg=blue},
row{odd}={bg={blue!12}},
}
&T&M&M&T&\\
leq
& \leq
& \leq
& \leqslant
& \leqslant
& leqslant
\\
geq
& \geq
& \geq
& \geqslant
& \geqslant
& geqslant
\\
eqless
& \eqless
& \eqless
& \eqslantless
& \eqslantless
& eqslantless
\\
eqgtr
& \eqgtr
& \eqgtr
& \eqslantgtr
& \eqslantgtr
& eqslantgtr
\\
leqq
& \leqq
& \leqq
& \leqqslant
& \leqqslant
& leqqslant
\\
geqq
& \geqq
& \geqq
& \geqqslant
& \geqqslant
& geqqslant
\\
eqqless
& \eqqless
& \eqqless
& \eqqslantless
& \eqqslantless
& eqqslantless
\\
eqqgtr
& \eqqgtr
& \eqqgtr
& \eqqslantgtr
& \eqqslantgtr
& eqqslantgtr
\\
\end{longtblr}
\addfontfeature{RawFeature={+saltineq}}
\setmathfont{texgyretermes-math.otf}[
RawFeature={+saltineq},
]
\begin{longtblr}[caption={With feature},
note{a}={Red is \texttt{\textbackslash textrm} in math mode.},
remark{Note}={Text = XITS; Math = TeX Gyre Termes - Math.},
]{colspec={Q[r]Q[c]Q[c]Q[c]Q[c]Q[l]},
cell{2-Z}{1,6}={font=\ttfamily,cmd={\textbackslash}},
column{3,4}={mode=imath},
column{3}={fg=blue},
row{odd}={bg={blue!12}},
%cell{6-9}{3-4}={bg={red!5}},
}
&T&M&M&T&\\
leq
& \leq
& \leq
& \leqslant
& \leqslant
& leqslant
\\
geq
& \geq
& \geq
& \geqslant
& \geqslant
& geqslant
\\
eqless
& \eqless
& \eqless
& \eqslantless
& \eqslantless
& eqslantless
\\
eqgtr
& \eqgtr
& \eqgtr
& \eqslantgtr
& \eqslantgtr
& eqslantgtr
\\
leqq
& \leqq
& \cg{\leqq}
& \cg{\leqqslant}
& \leqqslant
& leqqslant
\\
geqq
& \geqq
& \cg{\geqq}
& \cg{\geqqslant}
& \geqqslant
& geqqslant
\\
eqqless
& \eqqless
& \cg{\eqqless}
& \cg{\eqqslantless}
& \eqqslantless
& eqqslantless
\\
eqqgtr
& \eqqgtr
& \cg{\eqqgtr}
& \cg{\eqqslantgtr}
& \eqqslantgtr
& eqqslantgtr
\\
\end{longtblr}
\end{document}
编辑
一个更实际的例子
数学模式中的字体特征必须可见unicode-math，以便在符号刷新时拾取它。
平均能量损失
\documentclass{article}
\usepackage{xcolor}
\usepackage{tabularray}
\usepackage{unicode-math}
\directlua{
fonts.handlers.otf.addfeature{
name = "saltineq",
type = "alternate",
data =
{
["≤"] = "⩽", %-- \leqslant
["≥"] = "⩾", %-- \geqslant
["⋜"] = "⪕", %-- \eqslantless
["⋝"] = "⪖", %-- \eqslantgtr
["⪙"] = "⪛", %-- \eqqslantless
["⪚"] = "⪜", %-- \eqqslantgtr
["≦"] = "⫹", %-- \leqqslant
["≧"] = "⫺", %-- \geqqslant
},
}
}
\newcommand\fontmimname{Asana Math}
\setmathfont{texgyretermes-math.otf}[
% RawFeature={+saltineq},
]
\setmathfont[
Colour=red,
range={\eqqslantgtr,
\eqqgtr,
\leqqslant,
\geqqslant,
\eqqslantless,
\eqqless,
}
]{\fontmimname}
\begin{document}
\addfontfeature{RawFeature={-saltineq}}
\begin{longtblr}[caption={Without feature},
note{a}={Red is imported from \fontmimname{}, without the feature activated.},
remark{Note}={Text = Default; Math = TeX Gyre Termes - Math.},
]{
colspec={Q[r]Q[c]Q[c]Q[c]Q[c]Q[l]},
cell{2-Z}{1,6}={font=\ttfamily,cmd={\textbackslash}},
column{3,4}={mode=imath},
column{3}={fg=blue},
row{odd}={bg={blue!12}},
}
&T&M&M&T&\\
leq
& \leq
& \leq
& \leqslant
& \leqslant
& leqslant
\\
geq
& \geq
& \geq
& \geqslant
& \geqslant
& geqslant
\\
eqless
& \eqless
& \eqless
& \eqslantless
& \eqslantless
& eqslantless
\\
eqgtr
& \eqgtr
& \eqgtr
& \eqslantgtr
& \eqslantgtr
& eqslantgtr
\\
leqq
& \leqq
& \leqq
& \leqqslant
& \leqqslant
& leqqslant
\\
geqq
& \geqq
& \geqq
& \geqqslant
& \geqqslant
& geqqslant
\\
eqqless
& \eqqless
& \eqqless
& \eqqslantless
& \eqqslantless
& eqqslantless
\\
eqqgtr
& \eqqgtr
& \eqqgtr
& \eqqslantgtr
& \eqqslantgtr
& eqqslantgtr
\\
\end{longtblr}
\addfontfeature{RawFeature={+saltineq}}
\setmathfont{texgyretermes-math.otf}[
RawFeature={+saltineq},
]
\setmathfont[
RawFeature={+saltineq},
Colour=brown,
range={\eqqslantgtr,
\eqqgtr,
\leqqslant,
\geqqslant,
\eqqslantless,
\eqqless,
\leqq,
\geqq,
}
]{\fontmimname}
\begin{longtblr}[caption={With feature},
note{a}={Brown is imported from \fontmimname{}, with the feature activated.},
remark{Note}={Text = Default; Math = TeX Gyre Termes - Math.},
]{colspec={Q[r]Q[c]Q[c]Q[c]Q[c]Q[l]},
cell{2-Z}{1,6}={font=\ttfamily,cmd={\textbackslash}},
column{3,4}={mode=imath},
column{3}={fg=blue},
row{odd}={bg={blue!12}},
%cell{6-9}{3-4}={bg={red!5}},
}
&T&M&M&T&\\
leq
& \leq
& \leq
& \leqslant
& \leqslant
& leqslant
\\
geq
& \geq
& \geq
& \geqslant
& \geqslant
& geqslant
\\
eqless
& \eqless
& \eqless
& \eqslantless
& \eqslantless
& eqslantless
\\
eqgtr
& \eqgtr
& \eqgtr
& \eqslantgtr
& \eqslantgtr
& eqslantgtr
\\
leqq
& \leqq
& \leqq
& \leqqslant
& \leqqslant
& leqqslant
\\
geqq
& \geqq
& \geqq
& \geqqslant
& \geqqslant
& geqqslant
\\
eqqless
& \eqqless
& \eqqless
& \eqqslantless
& \eqqslantless
& eqqslantless
\\
eqqgtr
& \eqqgtr
& \eqqgtr
& \eqqslantgtr
& \eqqslantgtr
& eqqslantgtr
\\
\end{longtblr}
\end{document}
答案4
这不是答案，而且不如 AtBeginDocument 优雅，但您可以在文档内部重新定义。如果需要，可以将其限制为一个组。
平均能量损失
\documentclass[10pt,a4paper,french]{article}
\usepackage{mathtools}
\usepackage{babel}
\usepackage[warnings-off={mathtools-colon,mathtools-overbracket},math-style=french]{unicode-math}
\usepackage[default]{fontsetup}
\usepackage[scale={0.75,0.8},footskip=1.5cm,heightrounded]{geometry}
\NewDocumentCommand{\oldleqslant}{}{\leqslant}%modification du <=
%%\RenewDocumentCommand{\leq}{}{\leqslant}%modification du <=
\begin{document}
\[x\leq 3\]
\RenewDocumentCommand{\leq}{}{\oldleqslant}%modification du <=
\[x\leq 3\]
\end{document}