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我常用的Markdown公式符号
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公式效果
| \frac{a}{b} | ab\frac{a}{b}ba? |
| \frac{\partial f}{\partial x} | ?f?x\frac{\partial f}{\partial x}?x?f? |
| \sqrt[n]{3} | 3n\sqrt[n]{3}n3? |
| \overline{x} | x ̄\overline{x}x |
| \hat{x} | x^\hat{x}x^ |
| \tilde | x~\tilde{x}x~ |
| \dot{x} | x˙\dot{x}x˙ |
| \ddot{x} | x¨\ddot{x}x¨ |
| \sum_{k=1}^{n} | ∑k=1n\sum_{k=1}^{n}∑k=1n? |
| \prod_{k=1}^{n} | ∏k=1n\prod_{k=1}^{n}∏k=1n? |
| \int_{- \infty}^{x} | ∫?∞x\int_{- \infty}^{x}∫?∞x? |
| \lim_{n \to +\infty} \frac{1}{n} | lim?n→+∞1n\lim_{n \to +\infty} \frac{1}{n}limn→+∞?n1? |
| \ne | ≠\ne?= |
| \le | ≤\le≤ |
| \ge | ≥\ge≥ |
| \approx | ≈\approx≈ |
| \pm | ±\pm± |
| \times | ×\times× |
| \div | ÷\div÷ |
| \cdot | ?\cdot? |
| \equiv | ≡\equiv≡ |
| a \sim b | a~ba \sim ba~b |
| a \quad b | aba \quad bab |
| a \qquad b | aba \qquad bab |
| a \implies b | a?ba \implies ba?b |
| a \to b | a→ba \to ba→b |
| a \gets b | a←ba \gets ba←b |
| a \iff b | a?ba \iff ba?b |
| a \wedge b | a∧ba \wedge ba∧b |
| \leftrightarrow | ?\leftrightarrow? |
| \perp | ⊥\perp⊥ |
| \odot | ⊙\odot⊙ |
| \otimes | ?\otimes? |
| \bigodot | ?\bigodot? |
| \bigotimes | ?\bigotimes? |
| \bigoplus | ?\bigoplus? |
| \forall | ?\forall? |
| \exists | ?\exists? |
| a \triangleq b | a?ba \triangleq ba?b |
| a \cong b | a?ba \cong ba?b |
公式效果
| \sigma | σ\sigmaσ |
| \lambda | λ\lambdaλ |
| \theta | θ\thetaθ |
| \varphi | φ\varphiφ |
| \psi | ψ\psiψ |
| \gamma | γ\gammaγ |
| \phi | ?\phi? |
| \mu | μ\muμ |
| \delta | δ\deltaδ |
| \alpha | α\alphaα |
| \xi | ξ\xiξ |
| \epsilon | ?\epsilon? |
| \eta | η\etaη |
| \beta | β\betaβ |
| \upsilon | υ\upsilonυ |
| \tau | τ\tauτ |
| \rho | ρ\rhoρ |
| \chi | χ\chiχ |
| \omega | ω\omegaω |
| \pi | π\piπ |
| \iota | ι\iotaι |
| \nu | ν\nuν |
| \Pi | Π\PiΠ |
| \Sigma | Σ\SigmaΣ |
| \Omega | Ω\OmegaΩ |
| \Lambda | Λ\LambdaΛ |
| \Phi | Φ\PhiΦ |
| \Gamma | Γ\GammaΓ |
| \Delta | Δ\DeltaΔ |
| \Theta | Θ\ThetaΘ |
公式效果
| \emptyset | ?\emptyset? |
| \subset | ?\subset? |
| \supset | ?\supset? |
| \in | ∈\in∈ |
| \subseteq | ?\subseteq? |
| \supseteq | ?\supseteq? |
| \bigcap | ?\bigcap? |
| \bigcup | ?\bigcup? |
| \exists | ?\exists? |
公式效果
| \nabla | ?\nabla? |
| \infty | ∞\infty∞ |
| \vdots | ?\vdots? |
| \ddots | ?\ddots? |
| \cdots | ?\cdots? |
公式效果
| \begin{matrix} a & b \\ c & d \end{matrix} | abcd\begin{matrix} a & b \\ c & d \end{matrix}ac?bd? |
| \begin{pmatrix} a & b \\ c & d \\ \end{pmatrix} | (abcd)\begin{pmatrix} a & b \\ c & d \\ \end{pmatrix}(ac?bd?) |
| \begin{bmatrix} a & b \\ c & d \\ \end{bmatrix} | [abcd]\begin{bmatrix} a & b \\ c & d \\ \end{bmatrix}[ac?bd?] |
| f(x) = \begin{cases} a, & {x \; is \; even} \\ b, & {x \; is \;odd} \end{cases} | f(x)={a,xisevenb,xisoddf(x) = \begin{cases} a, & {x \; is \; even} \\ b, & {x \; is \;odd} \end{cases}f(x)={a,b,?xisevenxisodd? |
| \begin{Bmatrix} a,b,c,d,e \end{Bmatrix} | {a,b,c,d,e}\begin{Bmatrix} a,b,c,d,e \end{Bmatrix}{a,b,c,d,e?} |
| \left\langle \phi(x_i), \phi(x_j) \right\rangle | ??(xi),?(xj)?\left\langle \phi(x_i), \phi(x_j) \right\rangle??(xi?),?(xj?)? |
| \lVert x_i - x_j \rVert_2 | ∥xi?xj∥2\lVert x_i - x_j \rVert_2∥xi??xj?∥2? |
| \fbox{k} | k\fbox{k}k? |
公式效果字體
| \Bbb{R} | R\Bbb{R}R | 黑板粗體 |
| \it{R} | R\it{R}R | 意大利體 |
| \bf{R} | R\bf{R}R | 粗體 |
| \rm{II} | II\rm{II}II | 羅馬體 |
| \cal{F} | KaTeX parse error: Undefined control sequence: \cal at position 1: \?c?a?l?{F} | 花體 |
公式效果備注
| y=2 \tag{k} | y=2(k)y=2 \tag{k}y=2(k) | 帶行標的內容,必須被雙美元符$$包裹,否則會報KaTeX parse error錯誤 |
| \left ( \frac{\frac{x}{y}}{z} + x + y + z \right) | (xyz+x+y+z)\left ( \frac{\frac{x}{y}}{z} + x + y + z \right)(zyx??+x+y+z) | 創建自動匹配高度的 (圓括號),[方括號] 和 {花括號} |
X = \left( \begin{matrix} 1 & x_{11} & x_{12} & ... & x_{1k} \\ 1 & x_{21} & x_{22} & ... & x_{2k} \\ \vdots & \vdots & \vdots & & \vdots \\ 1 & x_{n1} & x_{n2} & ... & x_{nk} \end{matrix} \right)
X=(1x11x12...x1k1x21x22...x2k????1xn1xn2...xnk)X = \left( \begin{matrix} 1 & x_{11} & x_{12} & ... & x_{1k} \\ 1 & x_{21} & x_{22} & ... & x_{2k} \\ \vdots & \vdots & \vdots & & \vdots \\ 1 & x_{n1} & x_{n2} & ... & x_{nk} \end{matrix} \right)X=??????11?1?x11?x21??xn1??x12?x22??xn2??.........?x1k?x2k??xnk????????
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