常用数学符号读法大全

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数学符号及读法大全

数学符号及读法大全

数学符号及读法大全一、基本符号及读法1. 加号(+):读作“加”或“正”。

例如,2 + 3 读作“二加三”或“二正三”。

2. 减号():读作“减”或“负”。

例如,5 2 读作“五减二”或“五负二”。

3. 乘号(×):读作“乘”。

例如,4 × 6 读作“四乘六”。

4. 除号(÷):读作“除以”。

例如,8 ÷ 2 读作“八除以二”。

5. 等号(=):读作“等于”。

例如,3 + 4 = 7 读作“三加四等于七”。

6. 不等号(≠):读作“不等于”。

例如,5 ≠ 6 读作“五不等于六”。

7. 大于号(>):读作“大于”。

例如,7 > 5 读作“七大于五”。

8. 小于号(<):读作“小于”。

例如,3 < 8 读作“三小于八”。

9. 大于等于号(≥):读作“大于等于”。

例如,x ≥ 5 读作“x大于等于五”。

10. 小于等于号(≤):读作“小于等于”。

例如,y ≤ 10 读作“y小于等于十”。

二、指数与对数符号及读法1. 指数符号(^):读作“的幂”。

例如,2^3 读作“二的三次幂”。

2. 对数符号(log):读作“以为底的对数”。

例如,log₂8 读作“以二为底八的对数”。

三、集合符号及读法1. 属于符号(∈):读作“属于”。

例如,3 ∈ {1, 2, 3} 读作“三属于集合{一、二、三}”。

2. 不属于符号(∉):读作“不属于”。

例如,4 ∉ {1, 2, 3} 读作“四不属于集合{一、二、三}”。

3. 空集符号(∅):读作“空集”。

例如,∅表示一个不包含任何元素的集合。

四、几何符号及读法1. 直线符号(→):读作“直线”。

例如,AB → 表示直线AB。

2. 射线符号(⇀):读作“射线”。

例如,AC ⇀表示射线AC。

3. 线段符号(|):读作“线段”。

例如,BC | 表示线段BC。

4. 角符号(∠):读作“角”。

例如,∠ABC 表示角ABC。

数学符号的读法

数学符号的读法

数学符号的读法α( 阿而法)β( 贝塔)γ(伽马)δ(德尔塔)ε(艾普西龙)ζ(截塔)η(艾塔)θ(西塔)ι约塔)κ(卡帕)λ(兰姆达)μ(米尤)ν(纽)ξ(可系)ο(奥密克戎)π (派)ρ (若)σ (西格马)τ (套)υ (英文或拉丁字母)φ(斐)χ(喜)ψ(普西))ω(欧米伽)α Α alpha 【'ælfə】β Β beta 【'bi:tə, 'beitə】γ Γ gamma 【'gæmə】δ Δ delta 【'deltə】ε Ε epsil on 【ep'sailən, 'epsilən】ζ Ζ zeta 【'zi:tə】η Η eta 【'i:tə】θ Θ theta 【'θi:tə】ι Ι iota 【ai'əutə】κ Κ kappa 【'kæpə】λ ∧lambda 【'læmdə】μ Μ mu 【mju:】ν Ν nu 【nju:】ξ Ξ xi 【ksai, ksi:】ο Ο omicron 【əu'maikrən】π ∏ pi 【pai】ρ Ρ rho 【rəu】σ ∑ sigma 【'sigmə】τ Τ tau 【tau】υ Υ upsilon 【ju:p'sailən】φ Φ phi 【fai】χ Χ chi 【kai, ki:】ψ Ψ psi 【psai】ω Ω omega 【'əumigə】更全面:1 Α α alpha a:lf 阿尔法角度;系数2 Β β beta bet 贝塔磁通系数;角度;系数3 Γ γ gamma ga:m 伽马电导系数(小写)4 Δ δ delta delt 德尔塔变动;密度;屈光度5 Ε ε epsilon ep`silon 伊普西龙对数之基数6 Ζ ζ zeta zat 截塔系数;方位角;阻抗;相对粘度;原子序数7 Η η eta eit 艾塔磁滞系数;效率(小写)8 Θ θ thet θit 西塔温度;相位角9 Ι ι iot aiot 约塔微小,一点儿10 Κ κ kappa kap 卡帕介质常数11 ∧λ lambda lambd 兰布达波长(小写);体积12 Μ μ mu mju 缪磁导系数;微(千分之一);放大因数(小写)13 Ν ν nu nju 纽磁阻系数14 Ξ ξ xi ksi 克西15 Ο ο omicron omik`ron 奥密克戎16 ∏ π pi pai 派圆周率=圆周÷直径=3.141617 Ρ ρ rho rou 肉电阻系数(小写)18 ∑ σ sigma `sigma 西格马总和(大写),表面密度;跨导(小写)19 Τ τ tau tau 套时间常数20 Υ υ upsilon jup`silon 宇普西龙位移21 Φ φ phi fai 佛爱磁通;角22 Χ χ chi phai 西23 Ψ ψ psi psai 普西角速;介质电通量(静电力线);角24 Ω ω omega o`miga 欧米伽欧姆(大写);角速(小写);角希腊字母读法Αα:阿尔法AlphaΒβ:贝塔BetaΓγ:伽玛GammaΔδ:德尔塔DelteΕε:艾普西龙Epsilonζ :捷塔ZetaΖη:依塔EtaΘθ:西塔ThetaΙι:艾欧塔IotaΚκ:喀帕Kappa∧λ:拉姆达LambdaΜμ:缪MuΝν:拗NuΞξ:克西XiΟο:欧麦克轮Omicron∏π:派PiΡρ:柔Rho∑σ:西格玛SigmaΤτ:套TauΥυ:宇普西龙UpsilonΦφ:fai PhiΧχ:器ChiΨψ:普赛PsiΩω:欧米伽Omega希腊字母怎么打打开Office文档之后,在你需要输入希腊字母的时候,先将输入法切换为英文状态,然后同时按下三个键Ctrl+Shift+Q ,工具栏上的“字体”就会发生变化此刻,你再对照下表输入a,b,c……即可得到您想要的希腊字母。

数学常用符号及读法大全

数学常用符号及读法大全

数学常⽤符号及读法⼤全数学符号及读法⼤全常⽤数学输⼊符号:≈≡ ≠ = ≤≥ <>≮≯∷ ± +- × ÷ /∫∮∝ ∞ ∧∨ ∑ 【∏π】∪∩∈∉∵∴⊥‖∠⌒≌∽ √ ()【】{}ⅠⅡ⊕⊙∥αβγδεζηθ Δ 空集∅公式输⼊符号≈≡≠=≤≥<>≮≯∷±+-×÷/∫∮∝∞∧∨∑∏∪∩∈∵∴⊥‖∠⌒⊙≌∽√+: plus(positive正的)-: minus(negative负的)*: multiplied by÷: divided by=: be equal to≈: be approximately equal to(): round brackets(parenthess)[]: square brackets{}: braces∵: because∴: therefore≤: less than or equal to≥: greater than or equal to∞: infinityLOGnX: logx to the base nxn: the nth power of xf(x): the function of xdx: diffrencial of xx+y: x plus y(a+b): bracket a plus b bracket closeda=b: a equals ba≠b: a isn't equal to ba>b : a is greater than ba>>b: a is much greater than ba≥b: a is greater than or equal to bx→∞: approches infinityx2: x squarex3: x cube√ ̄x: the square root of x3√ ̄x: the cube root of x3‰: three peimilln∑i=1xi: the summation of x where x goes from 1to nn∏i=1xi: the product of x sub i where igoes from 1to n∫ab: integral betweens a and b数学符号(理科符号)——运算符号1.基本符号:+- × ÷(/)2.分数号:/3.正负号:±4.相似全等:∽≌5.因为所以:∵∴6.判断类:= ≠ <≮(不⼩于)>≯(不⼤于)7.集合类:∈(属于)∪(并集)∩(交集)8.求和符号:∑9.n次⽅符号:¹(⼀次⽅) ²(平⽅) ³(⽴⽅)⁴(4次⽅)ⁿ(n次⽅)10.下⾓标:₁₂₃₄(如:A₁B₂C₃D₄效果如何?)11.或与⾮的"⾮":¬12.导数符号(备注符号):′〃13.度:° ℃14.任意:∀14-2.“存在”:∃15.推出号:⇒16.等价号:⇔17.包含被包含:⊆⊇⊂⊃18.导数:∫∬19.箭头类:↗↙↖↘↑↓↔↕↑↓→←20.绝对值:|21.弧:⌒22.圆:⊙ 11.或与⾮的"⾮":¬12.导数符号(备注符号):′〃13.度:° ℃14.任意:∀15.推出号:⇒16.等价号:⇔17.包含被包含:⊆⊇⊂⊃18.导数:∫∬19.箭头类:↗↙↖↘↑↓↔↕↑↓→←20.绝对值:|21.弧:⌒22.圆:⊙αβγδεζηθικλ µ νξοπρστυφχψωΑΒΓ Δ ΕΖΗΘΙΚ∧ΜΝΞΟ∏Ρ ∑ ΤΥΦΧΨΩа б в г д е ё ж з и й к л м н о п р с т у ф х ц ч ш щ ъы ь э ю яА Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю ЯΔ⼤写⼩写英⽂注⾳国际⾳标注⾳中⽂注⾳Ααalpha alfa阿⽿法Ββbeta beta贝塔Γγgamma gamma伽马Δδdeta delta德⽿塔Εεepsilon epsilon艾普西隆Ζζzeta zeta截塔Ηηeta eta艾塔Θθthetaθita西塔Ιιiota iota约塔Κκkappa kappa卡帕∧λlambda lambda兰姆达Μµmu miu缪Ννnu niu纽Ξξxi ksi可塞Οοomicron omikron奥密可戎∏πpi pai派Ρρrho rou柔∑σsigma sigma西格马Ττtau tau套Υυupsilon jupsilon⾐普西隆Φφphi fai斐Χχchi khai喜Ψψpsi psai普西Ωωomega omiga欧⽶符号含义i-1的平⽅根f(x)函数f在⾃变量x处的值sin(x)在⾃变量x处的正弦函数值exp(x)在⾃变量x处的指数函数值,常被写作ex a^x a的x次⽅;有理数x由反函数定义ln x exp x 的反函数ax同 a^xlogba以b为底a的对数; blogba = alogba以b为底a的对数; blogba = acos x在⾃变量x处余弦函数的值tan x其值等于 sin x/cos xcot x余切函数的值或 cos x/sin xsec x正割含数的值,其值等于 1/cos xcsc x余割函数的值,其值等于 1/sin xasin x y,正弦函数反函数在x处的值,即 x = sin yacos x y,余弦函数反函数在x处的值,即 x = cos yatan x y,正切函数反函数在x处的值,即 x = tan yacot x y,余切函数反函数在x处的值,即 x = cot yasec x y,正割函数反函数在x处的值,即 x = sec yacsc x y,余割函数反函数在x处的值,即 x = csc yθ⾓度的⼀个标准符号,不注明均指弧度,尤其⽤于表⽰atan x/y,当x、y、z⽤于表⽰空间中的点时i, j, k分别表⽰x、y、z⽅向上的单位向量(a, b, c)以a、b、c为元素的向量(a, b)以a、b为元素的向量(a, b)a、b向量的点积a•b a、b向量的点积(a•b)a、b向量的点积|v|向量v的模|x|数x的绝对值Σ表⽰求和,通常是某项指数。

数学符号及读法大全

数学符号及读法大全

数学符号及读法大全常用数学输入符号:≈≡≠=≤≥<>≮≯∷±+-×÷/∫∮∝∞∧∨∑∏∪∩∈∵∴⊥‖∠⌒≌∽√()【】{}ⅠⅡ⊕⊙∥αβγδεζηθΔ大写小写英文注音国际音标注音中文注音Ααalpha alfa 阿耳法Ββbeta beta 贝塔Γγgamma gamma 伽马Δδdeta delta 德耳塔Εεepsilon epsilon 艾普西隆Ζζzeta zeta 截塔Ηηeta eta 艾塔Θθtheta θita 西塔Ιιiota iota 约塔Κκkappa kappa 卡帕∧λlambda lambda 兰姆达Μμmu miu 缪Ννnu niu 纽Ξξxi ksi 可塞Οοomicron omikron 奥密可戎∏πpi pai 派Ρρrho rou 柔∑σsigma sigma 西格马Ττtau tau 套Υυupsilon jupsilon 衣普西隆Φφphi fai 斐Χχchi khai 喜Ψψpsi psai 普西Ωωomega omiga 欧米符号含义i -1的平方根f(x) 函数f在自变量x处的值sin(x) 在自变量x处的正弦函数值exp(x) 在自变量x处的指数函数值,常被写作exa^x a的x次方;有理数x由反函数定义ln x exp x 的反函数ax 同a^xlogba 以b为底a的对数;blogba = acos x 在自变量x处余弦函数的值tan x 其值等于sin x/cos xcot x 余切函数的值或cos x/sin xsec x 正割含数的值,其值等于1/cos xcsc x 余割函数的值,其值等于1/sin xasin x y,正弦函数反函数在x处的值,即x = sin yacos x y,余弦函数反函数在x处的值,即x = cos yatan x y,正切函数反函数在x处的值,即x = tan yacot x y,余切函数反函数在x处的值,即x = cot y asec x y,正割函数反函数在x处的值,即x = sec y acsc x y,余割函数反函数在x处的值,即x = csc yθ角度的一个标准符号,不注明均指弧度,尤其用于表示atan x/y,当x、y、z用于表示空间中的点时i, j, k 分别表示x、y、z方向上的单位向量(a, b, c) 以a、b、c为元素的向量(a, b) 以a、b为元素的向量(a, b) a、b向量的点积a•b a、b向量的点积(a•b) a、b向量的点积|v| 向量v的模|x| 数x的绝对值Σ表示求和,通常是某项指数。

所有的数学符号及读法

所有的数学符号及读法

所有的数学符号及读法所有的数学符号及读法及读法⼤全常⽤数学输⼊符号:≈≡ ≠ = ≤≥ <>≮≯∷ ± +- × ÷ /∫∮∝ ∞ ∧∨ ∑ ∏∪∩∈∵∴⊥‖∠⌒≌∽ √ ()【】{}ⅠⅡ⊕⊙∥αβγδεζηθ Δ⼤写⼩写英⽂注⾳国际⾳标注⾳中⽂注⾳Ααalpha alfa阿⽿法Ββbeta beta贝塔Γγgamma gamma伽马Δδdeta delta德⽿塔Εεepsilon epsilon艾普西隆Ζζzeta zeta截塔Ηηeta eta艾塔Θθthetaθita西塔Ιιiota iota约塔Κκkappa kappa∧λlambda lambda兰姆达Μµmu miu缪Ννnu niu纽Ξξxi ksi可塞Οοomicron omikron奥密可戎∏πpi pai派Ρρrho rou柔∑σsigma sigma西格马Ττtau tau套Υυupsilon jupsilon⾐普西隆Φφphi fai斐Χχchi khai喜Ψψpsi psai普西Ωωomega omiga欧⽶符号含义i-1的f(x)函数f在⾃变量x处的值sin(x)在⾃变量x处的值exp(x)在⾃变量x处的值,常被写作exa^x a的x次⽅;有理数x由定义ln x exp x 的反函数ax同 a^xlogba以b为底a的对数; blogba = acos x在⾃变量x处的值tan x其值等于 sin x/cos xcot x的值或 cos x/sin xsec x含数的值,其值等于 1/cos xcsc x的值,其值等于 1/sin xasin x y,正弦函数反函数在x处的值,即 x = sin yacos x y,余弦函数反函数在x处的值,即 x = cos yatan x y,反函数在x处的值,即 x = tan yacot x y,余切函数反函数在x处的值,即 x = cot yasec x y,反函数在x处的值,即 x = sec yacsc x y,余割函数反函数在x处的值,即 x = csc yθ⾓度的⼀个标准符号,不注明均指弧度,尤其⽤于表⽰atan x/y,当x、y、z⽤于表⽰空间中的点时i, j, k分别表⽰x、y、z⽅向上的(a, b, c)以a、b、c为元素的向量(a, b)以a、b为元素的向量(a, b)以a、b为元素的向量(a, b)a、b向量的点积a·b a、b向量的点积(a·b)a、b向量的点积|v|向量v的模|x|数x的绝对值Σ表⽰求和,通常是某项指数。

(完整版)数学符号及读法大全

(完整版)数学符号及读法大全

数学符号大全数学符号及读法大全常用数学输入符号:≈≡≠=≤≥<>≮≯∷±+-×÷/∫∮∝∞∧∨∑∏∪∩∈∵∴⊥‖∠⌒≌∽√()【】{}ⅠⅡ⊕⊙∥αβγδεζηθΔ公式输入符号≈≡≠=≤≥<>≮≯∷±+-×÷/∫∮∝∞∧∨∑∏∪∩∈∵∴⊥‖∠⌒⊙≌∽√+:plus(positive正的)-:minus(negative负的)*:multiplied by÷:divided by=:be equal to≈:be approximately equal to():round brackets(parenthess)[]:square brackets{}:braces∵:because∴:therefore≤:less than or equal to≥:greater than or equal to∞:infinityLOGnX:logx to the base nxn:the nth power of xf(x):the function of xdx:diffrencial of xx+y:x plus y(a+b):bracket a plus b bracket closeda=b: a equals ba≠b: a isn't equal to ba>b : a is greater than ba>>b: a is much greater than ba≥b: a is greater than or equal to bx→∞:approches infinityx2:x squarex3:x cube√ ̄x:the square root of x3√ ̄x:the cube root of x3‰:three peimilln∑i=1xi:the summation of x where x goes from 1to nn∏i=1xi:the product of x sub i where igoes from 1to n ∫ab:integral betweens a and b数学符号(理科符号)——运算符号1.基本符号:+- × ÷(/)2.分数号:/3.正负号:±4.相似全等:∽≌5.因为所以:∵∴6.判断类:=≠<≮(不小于)>≯(不大于)7.集合类:∈(属于)∪(并集)∩(交集)8.求和符号:∑9.n次方符号:¹(一次方) ²(平方) ³(立方)⁴(4次方)ⁿ(n次方)10.下角标:₁₂₃₄(如:A₁B₂C₃D₄效果如何?)11.或与非的"非":¬12.导数符号(备注符号):′〃13.度:°℃14.任意:∀15.推出号:⇒16.等价号:⇔17.包含被包含:⊆⊇⊂⊃18.导数:∫∬19.箭头类:↗↙↖↘↑↓↔↕↑↓→←20.绝对值:|21.弧:⌒22.圆:⊙11.或与非的"非":¬12.导数符号(备注符号):′〃13.度:°℃14.任意:∀15.推出号:⇒16.等价号:⇔17.包含被包含:⊆⊇⊂⊃18.导数:∫∬19.箭头类:↗↙↖↘↑↓↔↕↑↓→←20.绝对值:|21.弧:⌒22.圆:⊙αβγδεζηθικλμνξοπρστυφχψωΑΒΓΔΕΖΗΘΙΚ∧ΜΝΞΟ∏Ρ∑ΤΥΦΧΨΩабвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯΔ。

数学符号读法大全(免费)

数学符号读法大全(免费)

N的阶级大写小写英文注音国际音标注音中文注音Ααalpha alfa 阿耳法Ββbeta beta 贝塔Γγgamma gamma 伽马Γδdeta delta 德耳塔Δεepsilon epsilon 艾普西隆Εδzeta zeta 截塔Ζεeta eta 艾塔Θζtheta ζita西塔Ηηiota iota 约塔Κθkappa kappa 卡帕∧ιlambda lambda 兰姆达Μκmu miu 缪Νλnu niu 纽Ξμxi ksi 可塞Ονomicron omikron 奥密可戎∏πpi pai 派Ρξrho rou 柔∑ζsigma sigma 西格马Τηtau tau 套Υυupsilon jupsilon 衣普西隆Φθphi fai 斐Φχchi khai 喜Χψpsi psai 普西Ψωomega omiga 欧米伽符号表符号含义i -1的平方根f(x) 函数f在自变量x处的值sin(x) 在自变量x处的正弦函数值exp(x) 在自变量x处的指数函数值,常被写作exa^x a的x次方;有理数x由反函数定义ln x exp x 的反函数ax 同a^xlogba 以b为底a的对数;blogba = acos x 在自变量x处余弦函数的值tan x 其值等于sin x/cos xcot x 余切函数的值或cos x/sin xsec x 正割含数的值,其值等于1/cos xcsc x 余割函数的值,其值等于1/sin xasin x y,正弦函数反函数在x处的值,即x = sin y acos x y,余弦函数反函数在x处的值,即x = cos yatan x y,正切函数反函数在x处的值,即x = tan y acot x y,余切函数反函数在x处的值,即x = cot y asec x y,正割函数反函数在x处的值,即x = sec y acsc x y,余割函数反函数在x处的值,即x = csc yζ角度的一个标准符号,不注明均指弧度,尤其用于表示atan x/y,当x、y、z 用于表示空间中的点时i, j, k 分别表示x、y、z方向上的单位向量(a, b, c) 以a、b、c为元素的向量(a, b) 以a、b为元素的向量(a, b) a、b向量的点积a?b a、b向量的点积(a?b) a、b向量的点积|v| 向量v的模|x| 数x的绝对值Σ表示求和,通常是某项指数。

数学符号及读法大全

数学符号及读法大全

数学符号及读法⼤全数学符号及读法⼤全常⽤数学输⼊符号:≈≡ ≠ = ≤≥ <>≮≯∷ ± +- × ÷ /∫∮∝ ∞ ∧∨ ∑ ∏∪∩∈∵∴⊥‖∠⌒≌∽ √ ()【】{}ⅠⅡ⊕⊙∥αβγδεζηθ Δ⼤写⼩写英⽂注⾳国际⾳标注⾳中⽂注⾳Ααalpha alfa阿⽿法Ββbeta beta贝塔Γγgamma gamma伽马Δδdeta delta德⽿塔Εεepsilon epsilon艾普西隆Ζζzeta zeta截塔Ηηeta eta艾塔Θθthetaθita西塔Ιιiota iota约塔Κκkappa kappa卡帕∧λlambda lambda兰姆达Μµmu miu缪Ννnu niu纽Ξξxi ksi可塞Οοomicron omikron奥密可戎∏πpi pai派Ρρrho rou柔∑σsigma sigma西格马Ττtau tau套Υυupsilon jupsilon⾐普西隆Φφphi fai斐Χχchi khai喜Ψψpsi psai普西Ωωomega omiga欧⽶符号含义i-1的平⽅根f(x)函数f在⾃变量x处的值sin(x)在⾃变量x处的正弦函数值exp(x)在⾃变量x处的指数函数值,常被写作exa^x a的x次⽅;有理数x由反函数定义ln x exp x 的反函数ax同 a^xlogba以b为底a的对数; blogba = acos x在⾃变量x处余弦函数的值tan x其值等于 sin x/cos xcot x余切函数的值或 cos x/sin xsec x正割含数的值,其值等于 1/cos xcsc x余割函数的值,其值等于 1/sin xasin x y,正弦函数反函数在x处的值,即 x = sin yacos x y,余弦函数反函数在x处的值,即 x = cos yatan x y,正切函数反函数在x处的值,即 x = tan yacot x y,余切函数反函数在x处的值,即 x = cot yasec x y,正割函数反函数在x处的值,即 x = sec yacsc x y,余割函数反函数在x处的值,即 x = csc yθ⾓度的⼀个标准符号,不注明均指弧度,尤其⽤于表⽰atan x/y,当x、y、z⽤于表⽰空间中的点时i, j, k分别表⽰x、y、z⽅向上的单位向量(a, b, c)以a、b、c为元素的向量(a, b)以a、b为元素的向量(a, b)a、b向量的点积a•b a、b向量的点积(a•b)a、b向量的点积|v|向量v的模|x|数x的绝对值Σ表⽰求和,通常是某项指数。

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常用数学符号读法大全大写小写英文注音国际音标注音中文注音Ααalpha alfa 阿耳法Ββbeta beta 贝塔Γγgamma gamma 伽马Γδdeta delta 德耳塔Δεepsilon epsilon 艾普西隆Εδzeta zeta 截塔Ζεeta eta 艾塔Θζtheta ζita西塔Ηηiota iota 约塔Θθkappa kappa 卡帕ⅸιlambda lambda 兰姆达Μκmu miu 缪Νλnu niu 纽Ξμxi ksi 可塞Ονomicron omikron 奥密可戎∏πpi pai 派Ρξrho rou 柔∑ζsigma sigma 西格马Τηtau tau 套Υυupsilon jupsilon 衣普西隆Φθphi fai 斐Φχchi khai 喜Χψpsi psai 普西Ψωomega omiga 欧米伽常用数学符号大全1 几何符号↌ⅷⅶ↍↋ↆↄ△2 代数符号ⅴⅸⅹ~ⅼↅↇↈↃⅵↀ3运算符号×÷ⅳ±4集合符号ⅻⅺⅰ5特殊符号ⅲπ(圆周率)6推理符号|a| ↌ↂ△ⅶⅺⅻↅↆ±ↈↇⅰⅬⅭⅮⅯ↖↗↘↙ⅷⅸⅹ&; §↎↏←↑→↓↔↕↖↗ΓΔΘΛΞΟΠΣΦΧΨΩαβγδεδεζηθικλμνπξζηυθχψωⅠ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ Ⅸ Ⅹ Ⅺ Ⅻⅰ ⅱ ⅲ ⅳ ⅴ ⅵ ⅶ ⅷ ⅸ ⅹⅰⅱⅲ↚ⅳⅴⅵ↛ⅶ↜ⅷⅸⅹⅺⅻⅼⅽⅾⅿↀↁↂↃↄ↝ↅↆↇↈ↞↟↉↊⊕↋↌↠↍℃指数0123:o123上述符号所表示的意义和读法(中英文参照)+ plus 加号;正号- minus 减号;负号± plus or minus 正负号× is multiplied by 乘号÷ is divided by 除号= is equal to 等于号ↅ is not equal to 不等于号ↆ is equivalent to 全等于号ↄ is approximately equal to 约等于Ↄ is approximately equal to 约等于号< is less than 小于号> is more than 大于号ↇ is less than or equal to 小于或等于ↈ is more than or equal to 大于或等于% per cent 百分之…ⅵ infinity 无限大号ⅳ (square) root 平方根X squared X的平方X cubed X的立方ⅿ since; because 因为ⅾ hence 所以ⅶ angle 角↍ semicircle 半圆↋ circle 圆○ circumference 圆周△ triangle 三角形↌ perpendicular to 垂直于ⅻ intersection of 并,合集ⅺ union of 交,通集ⅼthe integral of …的积分ⅲ (sigma) summation of 总和° degree 度′ minute 分〃 second 秒#number …号@ at 单价CNN) -- Kezai started receiving professional tennis coaching at the age of eight. Since then his father has worked hard to cover his training costs.Two years on and it all seems to have paid off. In June, a local Chengdu company reached out to Li Chengpeng, Kezai's father, with an offer to sponsor Kezai.Soon after, a professional photographer took pictures of Kezai and his father for advertisements. But the family's happiness was short lived. The company withdrew the sponsorship.Though he says he was never given an explanation, Kezai's father believes it was because of his political activity. The company could not be reached for comment.As a controversial blogger and writer, Li announced his plan to run for office as an independent candidate for China's National People's Congress of Wuhou District, a legislative body at the local level in Sichuan province."You never know the benefit of standing up if you always stay on your knees," Li declared in a campaign statement on his microblog, where he has more than three million regular followers. Through the power of social media, Li's original message was forwarded more than 3,000 times within a few hours on micro-blogging site Sina Weibo, a popular twitter-like service.But such campaigns are rare in China.The Chinese do not choose their own president or premier because all government officials are pre-decided.However, elections are held on the local level, with all candidates approved by the party beforehand.China's electoral law stipulates that every Chinese citizen over 18 has the right to vote and run in local elections. Those, like Li Chengpeng, seeking to become candidates for county or township legislatures must first register and secure confirmation of their candidacy. They must then be nominated as "deputy candidate" by political parties, social organizations or have the signed support of at least 10 registered voters in their constituency.In practice, the government can rule candidates or any of their supporters unqualified and refuse to put them on the ballot, which critics say leaves ample opportunity for manipulation of the results."I know nobody on the ballot sheet. And I don't think my vote will make much difference," a retiree in Beijing said when she was asked to vote for the People's Congress district's last election.In recent months, an unprecedented number of Chinese citizens have declared themselves as independent candidates, according to Li Fan, founder of the World and China Institute that promotes democracy at the local levels.He said many candidates have grievances with the local government and feel they cannot get their voices out."They bid for the position as they think they can draw attention from the public for better solving of the problem," he said."Some local governments did think that their leadership was threatened by these (independent candidates), which is obviously not the case." Li Fan said.Some believe there are concerns among the central government as well. On June 8, state-run media Xinhua quoted the head of the Commission for Legislative Affairs of the National People's Congress Standing Committee as saying that "there is no such a thing as an'independent candidate' as it's not recognized by law." All candidates must follow the guidelines laid out by the government.But some do manage to meet the guidelines and run under the banner of an independent. The history of China's independent candidates dates back to 1998, when Yao Lifa, a teacher in Hubei Province, became the first self-described independent candidate elected to the local congress. He lost out when attempting a bid for a second term in 2003.With the government in control of the media and potential candidates subject to government approval, many question whether a truly independent candidate can win. Li Fan says morethan 100 people -- many using the internet -- have declared themselves as candidates for upcoming elections for people's congresses across the country."There are no fair and free elections in China," said Li Fan. "Chances are not good for these people leading the wave, but with their appeals, a lot more people will stand out to join in the election. They are the future."No matter what the chances are for Li Chengpeng, he says he is determined. "In China, there is so much unfairness and many choices in life are decided by the others," he explained during an interview with CNN. "I want to make decisions on my own."To achieve his goal, Li Chengpeng has visited more than 100 residents in his constituency, listening to their appeals to work out his campaign plan, trying to secure thegovernment-required support from 10 registered voters. He also continues to speak out on his blog.Li Chengpeng is not sure whether his name will appear on the ballot in September, when the election process officially begins, but he tries to be optimistic. "I'm confident. If I'm not confident, how can I convince my supporters?" he said.Li Chengpeng is not so confident about securing another tennis sponsorship for his son, if his political activities indeed caused him to lose the first one. He says he plans to fight on as an independent -- and he has his son's support.。

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