数学符号表－英文读法，含义，用法
SymbolWhat it isHow it is readHow it is usedAddition sign
Logical OR symbol... plus ...
... or ...Sum of a few values
Logical disjunctionMultiplication sign
Logical AND symbol... times ...
... and ...Product of two values
Logical conjunctionMultiplication sign... times ...Product of two valuesSummation signThe summation of ...Sum of many or infinitely many valuesIntegral signThe integral of ...IntegrationSubtraction sign
Minus sign... minus ...
Negative...Difference of two values, negative numberPlus/minus sign... plus or minus ...Expression of range, error, or toleranceDot product sign... dot ...Scalar (dot) product of two vectorsCross product sign... cross ...Vector (cross) product of two vectorsProduct signThe product of ...Product of three up to infinitely many valuesCarat... to the power of ...ExponentExclamation... factorialProduct of all positive integers up to a certain valueContinuation sign... and so on up to ...
... and so on indefinitelyExtension of sequenceSlash... divided by ...
... over ...DivisionDivision sign... divided by ...DivisionPercent symbol... percent ...ProportionPer mil symbol... per mil ...ProportionColon
Ratio sign... is to ...
... such that ...
... it is true that ...Division or ratio, symbol following logical quantifier or used in defining a setVertical line... such that ...
...it is true that ...Symbol following logical quantifier or used in defining a setDouble colon... averaged with ...Arithmetic meanLemniscate... infinity
... increases without limitInfinite summations
Infinite sequence LimitParentheses... quantity ...
... list ...
...set of coordinates...
...open intervalDenotes a quantity, list, set of coordinates, or an open intervalSquare brackets... the quantity ...
... the closed interval ...Denotes a quantity or a closed intervalHybrid brackets... the half-open interval ...Denotes a half-open intervalHybrid brackets... the half-open interval ...Denotes a half-open intervalCurly brackets... the quantity ...
... the set ...Denotes a quantity or a setEqual sign... equals ...Indicates two values are the sameProportionality sign... is proportional to ...Indicates two variables change in direct proportionSimilarity sign... is similar to ...Indicates two objects are geometrically similarApproximate equal sign... is approximately equal to ...Indicates two values are close to each otherInequality sign... is not equal to ...Indicates two values are differentInequality sign... is less than ...Indicates value on left is smaller than value on rightInequality sign... is less than or equal to ...
... is at most equal to ...Indicates value on left is smaller than or equal to value on rightInequality sign... is greater than ...
... is at most equal to ...Indicates value on left is larger than value on rightAbsolute value signThe absolute value of ...Distance of value from origin in number line, plane, or spaceInequality sign... is greater than or equal to ...Indicates value on left is larger than or equal to value on rightIncrement sign
Triangle symbolThe change in ...
Triangle ...Indicates a small change, Denotes vertices of triangleExistential quantifierFor some ...
There exists a(n) ...Logical statementsUniversal quantifierFor all ...
For every ...Logical statementsLogical negation symbolnot ...Logical statementsLogical implication symbol... implies ...
If ... then ...Logical statementsLogical equivalence symbol... is logically equivalent to ...
... if and only if ..Logical statementsThree dots... therefore ...
... it follows that ...Logical statements or mathematical proofsElement-of symbol... is an element of a set ...SetsNot-element-of symbol... is not an element of a set ...SetsSubset symbol... is a subset of ...SetsProper subset symbol... is a proper subset of ...SetsUnion symbol... union ...SetsIntersection symbol... intersect ...
... intersected with ...SetsNull symbolThe null set
The empty setSetsHebrew aleph (uppercase)Aleph ...Transfinite cardinalDegree symbol... degree(s)Angular measure
TemperatureGreek theta (lowercase)... theta ...Angular variableGreek phi (lowercase)... phi ...Angular variableGreek lambda (lowercase)... lambda ...Wavelength
Ratio
Eigenvalue
Lebesgue measureGreek mu (lowercase)micro- (10-6)Prefix multiplierGreek pi (lowercase)... pi ...General scienceGreek omega (uppercase)... omega ...Volume of an object
Ohms (resistance)Greek omega (lowercase)... omega ...Transfinite ordinal
Angular velocity
PeriodEnhanced or bold NThe set of natural numbersNumber theory
Set theoryEnhanced or bold ZThe set of integersNumber theory
Set theoryEnhanced or bold QThe set of rational numbersNumber theory
Set theoryEnhanced or bold RThe set of real numbersNumber theory
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