1/2 1/3 2/3 1/4 1/100 1/1000 113/324 注1 0.25 + – ± × ÷ = ≈ ( ) [ ] { } ≢ ≣ ∞ ∵ ∴ → x+y (a+b) a=b a≠b a±b a≈b a>b a>>b a
Symbol What it is Addition sign Logical OR symbol Multiplication sign Logical AND symbol How it is read ... plus ... ... or ... ... times ... ... and ... ... times ... The summation of ... The integral of ... ... minus ... Negative... ... plus or minus ... ... dot ... ... cross ... The product of ... ... to the power of ... ... factorial ... and so on up to ... ... and so on indefinitely ... divided by ... ... over ... ... divided by ... How it is used Sum of a few values Logical disjunction Product of two values Logical conjunction Product of two values Sum of many or infinitely many values Integration Difference of two values, negative number Expression of range, error, or tolerance Scalar (dot) product of two vectors Vector (cross) product of two vectors Product of three up to infinitely many values Exponent Product of all positive integers up to a certain value Extension of sequence Division Division Multiplication sign Summation sign Integral sign Subtraction sign Minus sign Plus/minus sign Dot product sign Cross product sign Product sign Carat Exclamation Continuation sign Slash Division sign Percent symbol Per mil symbol Colon Ratio sign Vertical line ... percent ... ... per mil ... ... is to ... ... such that ... ... it is true that ... ... such that ... ...it is true that ... ... averaged with ... ... infinity ... increases without limit ... quantity ... ... list ... ...set of coordinates... ...open interval ... the quantity ... ... the closed interval ... ... the half-open interval ... ... the half-open interval ... ... the quantity ... ... the set ... ... equals ... ... is proportional to ... ... is similar to ... ... is approximately equal to ... ... is not equal to ... ... is less than ... Proportion Proportion Division or ratio, symbol following logical quantifier or used in defining a set Symbol following logical quantifier or used in defining a set Arithmetic mean Infinite summations Infinite sequence Limit Denotes a quantity, list, set of coordinates, or an open interval Denotes a quantity or a closed interval Denotes a half-open interval Denotes a half-open interval Denotes a quantity or a set Indicates two values are the same Indicates two variables change in direct proportion Indicates two objects are geometrically similar Indicates two values are close to each other Indicates two values are different Indicates value on left is smaller than value on right Double colon Lemniscate Parentheses Square brackets Hybrid brackets Hybrid brackets Curly brackets Equal sign Proportionality sign Similarity sign Approximate equal sign Inequality sign Inequality sign Inequality sign Inequality sign Absolute value sign Inequality sign ... is less than or equal to ... Indicates value on left is smaller ... is at most equal to ... than or equal to value on right ... is greater than ... ... is at most equal to ... The absolute value of ... ... is greater than or equal to ... Indicates value on left is larger than value on right Distance of value from origin in number line, plane, or space Indicates value on left is larger than or equal to value on right Increment sign Triangle symbol Existential quantifier Universal quantifier The change in ... Triangle ... For some ... There exists a(n) ... For all ... For every ... Indicates a small change, Denotes vertices of triangle Logical statements Logical statements Logical statements Logical statements Logical negation symbol not ... Logical implication symbol Logical equivalence symbol Three dots Element-of symbol Not-element-of symbol Subset symbol Proper subset symbol Union symbol Intersection symbol Null symbol ... implies ... If ... then ... ... is logically equivalent to ... Logical statements ... if and only if .. ... therefore ... ... it follows that ... ... is an element of a set ... Logical statements or mathematical proofs Sets ... is not an element of a set ... Sets ... is a subset of ... ... is a proper subset of ... ... union ... ... intersect ... ... intersected with ... The null set The empty set Sets Sets Sets Sets Sets Transfinite cardinal Angular measure Temperature Angular variable Angular variable Wavelength Ratio Eigenvalue Lebesgue measure Prefix multiplier General science Hebrew aleph (uppercase) Aleph ... Degree symbol ... degree(s) Greek theta (lowercase) ... theta ... Greek phi (lowercase) ... phi ... Greek lambda (lowercase) ... lambda ... Greek mu (lowercase) Greek pi (lowercase) micro- (10) ... pi ... -6 Greek omega (uppercase) ... omega ... Volume of an object Ohms (resistance) Transfinite ordinal Angular velocity Period Number theory Set theory Number theory Set theory Number theory Set theory Number theory Greek omega (lowercase) ... omega ... Enhanced or bold N Enhanced or bold Z Enhanced or bold Q Enhanced or bold R The set of natural numbers The set of integers The set of rational numbers The set of real numbers希臘字母表 (Greek Alphabet Table)
