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数学符号表-英文读法,含义,用法

时间:2010-05-24 07:42:28  来源:  作者:

Symbol What it is How it is read How it is used Addition sign
Logical OR symbol
... plus ...
... or ...
Sum of a few values
Logical disjunction Multiplication sign
Logical AND symbol
... times ...
... and ...
Product of two values
Logical conjunction Multiplication sign
... times ...
Product of two values Summation sign
The summation of ...
Sum of many or infinitely many values Integral sign
The integral of ...
Integration Subtraction sign
Minus sign
... minus ...
Negative...
Difference of two values, negative number Plus/minus sign
... plus or minus ...
Expression of range, error, or tolerance Dot product sign
... dot ...
Scalar (dot) product of two vectors Cross product sign
... cross ...
Vector (cross) product of two vectors Product sign
The product of ...
Product of three up to infinitely many values Carat
... to the power of ...
Exponent Exclamation
... factorial
Product of all positive integers up to a certain value Continuation sign
... and so on up to ...
... and so on indefinitely
Extension of sequence Slash
... divided by ...
... over ...
Division Division sign
... divided by ...
Division Percent symbol
... percent ...
Proportion Per mil symbol
... per mil ...
Proportion Colon
Ratio sign
... is to ...
... such that ...
... it is true that ...
Division or ratio, symbol following logical quantifier or used in defining a set Vertical line
... such that ...
...it is true that ...
Symbol following logical quantifier or used in defining a set Double colon
... averaged with ...
Arithmetic mean Lemniscate
... infinity
... increases without limit
Infinite summations
Infinite sequence Limit Parentheses
... quantity ...
... list ...
...set of coordinates...
...open interval
Denotes a quantity, list, set of coordinates, or an open interval Square brackets
... the quantity ...
... the closed interval ...
Denotes a quantity or a closed interval Hybrid brackets
... the half-open interval ...
Denotes a half-open interval Hybrid brackets
... the half-open interval ...
Denotes a half-open interval Curly brackets
... the quantity ...
... the set ...
Denotes a quantity or a set Equal sign
... equals ...
Indicates two values are the same Proportionality sign
... is proportional to ...
Indicates two variables change in direct proportion Similarity sign
... is similar to ...
Indicates two objects are geometrically similar Approximate equal sign
... is approximately equal to ...
Indicates two values are close to each other Inequality sign
... is not equal to ...
Indicates two values are different Inequality sign
... is less than ...
Indicates value on left is smaller than value on right Inequality sign
... is less than or equal to ...
... is at most equal to ...
Indicates value on left is smaller than or equal to value on right Inequality sign
... is greater than ...
... is at most equal to ...
Indicates value on left is larger than value on right Absolute value sign
The absolute value of ...
Distance of value from origin in number line, plane, or space Inequality sign
... is greater than or equal to ...
Indicates value on left is larger than or equal to value on right Increment sign
Triangle symbol
The change in ...
Triangle ...
Indicates a small change, Denotes vertices of triangle Existential quantifier
For some ...
There exists a(n) ...
Logical statements Universal quantifier
For all ...
For every ...
Logical statements Logical negation symbol
not ...
Logical statements Logical implication symbol
... implies ...
If ... then ...
Logical statements Logical equivalence symbol
... is logically equivalent to ...
... if and only if ..
Logical statements Three dots
... therefore ...
... it follows that ...
Logical statements or mathematical proofs Element-of symbol
... is an element of a set ...
Sets Not-element-of symbol
... is not an element of a set ...
Sets Subset symbol
... is a subset of ...
Sets Proper subset symbol
... is a proper subset of ...
Sets Union symbol
... union ...
Sets Intersection symbol
... intersect ...
... intersected with ...
Sets Null symbol
The null set
The empty set
Sets Hebrew aleph (uppercase)

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