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— 数学

一些数学符号

看书时发现有些数学符号已经忘记含义了,整理到这方便查看


符号代码描述英文名
∑$\sum$求和公式Sum
∑i=0n$\sum_{i=0}^n$求和上下标Sum with limits
×$\times$乘号Multiplication
±$\pm$正负号Plus-minus
÷$\div$除号Division
∣$\mid$竖线Vertical bar
⋅$\cdot$点Dot
∘$\circ$圈Circle
∗$\ast$星号Asterisk
⨂$\bigotimes$克罗内克积Kronecker product
⨁$\bigoplus$异或XOR
≤$\leq$小于等于Less than or equal to
≥$\geq$大于等于Greater than or equal to
≠$\neq$不等于Not equal to
≈$\approx$约等于Approximately equal to
∏$\prod$N元乘积Product
∐$\coprod$N元余积Coproduct
⋯$\cdots$省略号Ellipsis
∫$\int$积分Integral
∬$\iint$双重积分Double integral
∮$\oint$曲线积分Contour integral
∞$\infty$无穷Infinity
∇$\nabla$梯度Nabla
∵$\because$因为Because
∴$\therefore$所以Therefore
∀$\forall$任意For all
∃$\exists$存在There exists
≠$\not=$不等于Not equal to
≯$\not>$不大于Not greater than
⊄$\not\subset$不属于Not subset of
∅$\emptyset$空集Empty set
∈$\in$属于Element of
∉$\notin$不属于Not element of
⊂$\subset$子集Subset
⊆$\subseteq$真子集Subset or equal to
⋃$\bigcup$并集Union
⋂$\bigcap$交集Intersection
⋁$\bigvee$逻辑或Logical OR
⋀$\bigwedge$逻辑与Logical AND
⨄$\biguplus$多重集Multiset union
⨆$\bigsqcup$方形并集Square union
y^$\hat{y}$期望值Expected value
yˇ$\check{y}$倒V符号Check
y˘$\breve{y}$倒U符号Breve
a+b+c+d―$\overline{a+b+c+d}$平均值Average
a+b+c+d―$\underline{a+b+c+d}$下划线Underline
a+b+c⏟1.0+d⏞2.0$\overbrace{a+\underbrace{b+c}_{1.0}+d}^{2.0}$上下括号Overbrace and underbrace
↑$\uparrow$向上Up arrow
↓$\downarrow$向下Down arrow
⇑$\Uparrow$双线向上箭头Double up arrow
⇓$\Downarrow$双线向下箭头Double down arrow
→$\rightarrow$向右Right arrow
←$\leftarrow$向左Left arrow
⇒$\Rightarrow$向右箭头Right double arrow
⟸$\Longleftarrow$向左长箭头Long left double arrow
⟵$\longleftarrow$向左单箭头Long left arrow
⟶$\longrightarrow$向右长箭头Long right arrow
⟹$\Longrightarrow$向右箭头Long right double arrow
α$\alpha$阿尔法Alpha
β$\beta$贝塔Beta
γ$\gamma$伽马Gamma
Γ$\Gamma$大写伽马Capital Gamma
δ$\delta$德尔塔Delta
Δ$\Delta$大写德尔塔Capital Delta
ϵ$\epsilon$艾普西龙Epsilon
ε$\varepsilon$变体艾普西龙Varepsilon
ζ$\zeta$泽塔Zeta
η$\eta$伊塔Eta
θ$\theta$西塔Theta
Θ$\Theta$大写西塔Capital Theta
ϑ$\vartheta$变体西塔Vartheta
ι$\iota$约塔Iota
π$\pi$派Pi
ϕ$\phi$斐Phi
Φ$\Phi$大写斐Capital Phi
ψ$\psi$普西Psi
Ψ$\Psi$大写普西Capital Psi
ω$\omega$欧米伽Omega
Ω$\Omega$大写欧米伽Capital Omega
χ$\chi$卡Chi
ρ$\rho$柔Rho
ο$\omicron$奥米克戎Omicron
σ$\sigma$西格玛Sigma
Σ$\Sigma$大写西格玛Capital Sigma
ν$\nu$纽Nu
ξ$\xi$克西Xi
τ$\tau$陶Tau
λ$\lambda$兰姆达Lambda
Λ$\Lambda$大写兰姆达Capital Lambda
μ$\mu$缪Mu
∂$\partial$偏导数Partial derivative
{}$\lbrace \rbrace$花括号Curly braces
a―$\overline{a}$上划线Overline

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