文章目录

<a href="#_1">上下约束/标注</a> <a href="#_8">数学字母字体</a> <a href="#_17">运算符</a> <a href="#_24">帽子</a>

上下约束/标注

<table> <thead> <tr> <th>含义</th> <th>语法</th> <th>效果</th> </tr> </thead> <tbody> <tr> <td>正上约束</td> <td>$\overset{i}{\sum}$</td> <td> ∑ i \overset{i}{\sum} ∑i​</td> </tr> <tr> <td>正下约束</td> <td>$\underset{i \le \delta}{max}$</td> <td> m a x i ≤ δ \underset{i \le \delta}{max} i≤δmax​</td> </tr> <tr> <td>右上右下约束</td> <td>$\sum_{i=1}^{m}$</td> <td> ∑ i = 1 m \sum_{i=1}^{m} ∑i=1m​</td> </tr> <tr> <td>正上正下约束</td> <td>$\sum \limits_{i=1}^{m}$</td> <td> ∑ i = 1 m \sum \limits_{i=1}^{m} i=1∑m​</td> </tr> </tbody> </table>nn# 数学字母字体

<table> <thead> <tr> <th>语法</th> <th>效果</th> </tr> </thead> <tbody> <tr> <td>\mathcal{a}</td> <td> a \mathcal{a} a b \mathcal{b} b c \mathcal{c} c d \mathcal{d} d e \mathcal{e} e f \mathcal{f} f g \mathcal{g} g h \mathcal{h} h i \mathcal{i} i j \mathcal{j} j k \mathcal{k} k l \mathcal{l} l m \mathcal{m} m n \mathcal{n} n o \mathcal{o} o p \mathcal{p} p q \mathcal{q} q r \mathcal{r} r s \mathcal{s} s t \mathcal{t} t u \mathcal{u} u v \mathcal{v} v w \mathcal{w} w x \mathcal{x} x y \mathcal{y} y z \mathcal{z} z</td> </tr> <tr> <td>\mathcal{A}</td> <td> A \mathcal{A} A B \mathcal{B} B C \mathcal{C} C D \mathcal{D} D E \mathcal{E} E F \mathcal{F} F G \mathcal{G} G H \mathcal{H} H I \mathcal{I} I J \mathcal{J} J K \mathcal{K} K L \mathcal{L} L M \mathcal{M} M N \mathcal{N} N O \mathcal{O} O P \mathcal{P} P Q \mathcal{Q} Q R \mathcal{R} R S \mathcal{S} S T \mathcal{T} T U \mathcal{U} U V \mathcal{V} V W \mathcal{W} W X \mathcal{X} X Y \mathcal{Y} Y Z \mathcal{Z} Z</td> </tr> <tr> <td>\mathbb{a}</td> <td> a \mathbb{a} a b \mathbb{b} b c \mathbb{c} c d \mathbb{d} d e \mathbb{e} e f \mathbb{f} f g \mathbb{g} g h \mathbb{h} h i \mathbb{i} i j \mathbb{j} j k \mathbb{k} k l \mathbb{l} l m \mathbb{m} m n \mathbb{n} n o \mathbb{o} o p \mathbb{p} p q \mathbb{q} q r \mathbb{r} r s \mathbb{s} s t \mathbb{t} t u \mathbb{u} u v \mathbb{v} v w \mathbb{w} w x \mathbb{x} x y \mathbb{y} y z \mathbb{z} z</td> </tr> <tr> <td>\mathbb{A}</td> <td> A \mathbb{A} A B \mathbb{B} B C \mathbb{C} C D \mathbb{D} D E \mathbb{E} E F \mathbb{F} F G \mathbb{G} G H \mathbb{H} H I \mathbb{I} I J \mathbb{J} J K \mathbb{K} K L \mathbb{L} L M \mathbb{M} M N \mathbb{N} N O \mathbb{O} O P \mathbb{P} P Q \mathbb{Q} Q R \mathbb{R} R S \mathbb{S} S T \mathbb{T} T U \mathbb{U} U V \mathbb{V} V W \mathbb{W} W X \mathbb{X} X Y \mathbb{Y} Y Z \mathbb{Z} Z</td> </tr> <tr> <td>\mathbf{a}</td> <td> a \mathbf{a} a b \mathbf{b} b c \mathbf{c} c d \mathbf{d} d e \mathbf{e} e f \mathbf{f} f g \mathbf{g} g h \mathbf{h} h i \mathbf{i} i j \mathbf{j} j k \mathbf{k} k l \mathbf{l} l m \mathbf{m} m n \mathbf{n} n o \mathbf{o} o p \mathbf{p} p q \mathbf{q} q r \mathbf{r} r s \mathbf{s} s t \mathbf{t} t u \mathbf{u} u v \mathbf{v} v w \mathbf{w} w x \mathbf{x} x y \mathbf{y} y z \mathbf{z} z</td> </tr> <tr> <td>\mathbf{A}</td> <td> A \mathbf{A} A B \mathbf{B} B C \mathbf{C} C D \mathbf{D} D E \mathbf{E} E F \mathbf{F} F G \mathbf{G} G H \mathbf{H} H I \mathbf{I} I J \mathbf{J} J K \mathbf{K} K L \mathbf{L} L M \mathbf{M} M N \mathbf{N} N O \mathbf{O} O P \mathbf{P} P Q \mathbf{Q} Q R \mathbf{R} R S \mathbf{S} S T \mathbf{T} T U \mathbf{U} U V \mathbf{V} V W \mathbf{W} W X \mathbf{X} X Y \mathbf{Y} Y Z \mathbf{Z} Z</td> </tr> </tbody> </table>nn# 运算符

<table> <thead> <tr> <th>含义</th> <th>语法</th> <th>效果</th> </tr> </thead> <tbody> <tr> <td>叉乘</td> <td>a \times b</td> <td> a × b a \times b a×b</td> </tr> <tr> <td>点乘</td> <td>a \cdot b</td> <td> a ⋅ b a \cdot b a⋅b</td> </tr> <tr> <td>内积</td> <td>\langle a, b \rangle</td> <td> ⟨ a , b ⟩ \langle a, b \rangle ⟨a,b⟩</td> </tr> <tr> <td>外积</td> <td>x \otimes b</td> <td> x ⊗ b x \otimes b x⊗b</td> </tr> </tbody> </table>nn# 帽子

<table> <thead> <tr> <th>含义</th> <th>语法</th> <th>效果</th> </tr> </thead> <tbody> <tr> <td>向量</td> <td>$\vec{a}$</td> <td> a ⃗ \vec{a} a <svg width="0.471em" height="0.714em" style="width:0.471em" viewbox="0 0 471 714" preserveaspectratio="xMinYMin"> </path> </svg></td> </tr> <tr> <td>平均值</td> <td>$\overline{a}$</td> <td> a ‾ \overline{a} a</td> </tr> <tr> <td>(线性回归，直线方程)y尖</td> <td>$\widehat{a}$</td> <td> a ^ \widehat{a} a <svg width="100%" height="0.24em" viewbox="0 0 1062 239" preserveaspectratio="none"> </path> </svg></td> </tr> <tr> <td>一阶倒数</td> <td>$\dot{a}$</td> <td> a ˙ \dot{a} a˙</td> </tr> <tr> <td>二阶导数</td> <td>$\ddot{a}$</td> <td> a ¨ \ddot{a} a¨</td> </tr> <tr> <td>^帽子命令</td> <td>$\hat{a}$</td> <td> a ^ \hat{a} a^</td> </tr> <tr> <td>帽子命令</td> <td>$\tilde{a}$</td> <td> a ~ \tilde{a} a</td> </tr> <tr> <td>倒尖帽子命令</td> <td>$\check{a}$</td> <td> a ˇ \check{a} aˇ</td> </tr> <tr> <td>4声调帽子命令</td> <td>$\grave{a}$</td> <td> a ˋ \grave{a} aˋ</td> </tr> <tr> <td>2声调帽子命令</td> <td>$\acute{a}$</td> <td> a ˊ \acute{a} aˊ</td> </tr> <tr> <td>大^帽子命令</td> <td>$\widehat{abcdefg}$</td> <td> a b c d e f g ^ \widehat{abcdefg} abcdefg <svg width="100%" height="0.42em" viewbox="0 0 2364 420" preserveaspectratio="none"> </path> </svg>​</td> </tr> <tr> <td>大~帽子命令</td> <td>$\widetilde{abcdefg}$</td> <td> a b c d e f g ~ \widetilde{abcdefg} abcdefg <svg width="100%" height="0.34em" viewbox="0 0 2340 312" preserveaspectratio="none"> </path> </svg>​</td> </tr> </tbody> </table>nn >

| 颚化符号 等价无穷小| $\widetitle {a}$ | KaTeX parse error: Undefined control sequence: \widetitle at position 1: \̲w̲i̲d̲e̲t̲i̲t̲l̲e̲ ̲{a} |

原文地址：https://blog.csdn.net/guai7guai11/article/details/126901624?ops_request_misc=&request_id=bf2bf62626484c059c37fe3e7545f9c4&biz_id=&utm_medium=distribute.pc_search_result.none-task-blog-2~all~koosearch~default-15-126901624-null-null.142^v88^insert_down28v1,239^v2^insert_chatgpt&utm_term=markdown