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# Content Element Reference

### Token Elements:

 Content Number Content Identifier Publicly defined symbols, functions and constants (MathML 2.0)

### Basic Content Elements:

 explicit application of a function to its argument equation or relation user-defined function interval constructor generic inverse separator in numeric values domain constructor declaration function construction from an expression compose two or more functions identity function domain of a function (MathML 2.0) codomain of a function (MathML 2.0) image of a function (MathML 2.0) region to integrate over, etc (MathML 2.0) piecewise defined function (MathML 2.0) one part of a piecewise function definition (MathML 2.0) default case of a piecewise function definition(MathML 2.0)

### Arithmetic, Algebra and Logic:

 division modulo base exponentiation factorial division maximum minimum subtraction addition to the power of remainder modulo base multiplication nth root greatset common denominator boolean and boolean or boolean exclusive or boolean not boolean implies universal quantifier existential quantifier absolute value complex conjugate argument of a complex number (MathML 2.0) real part of a complex number (MathML 2.0) imaginary part of a complex number (MathML 2.0) least common multiple (MathML 2.0) greatest integer less than or equal to a real number (MathML 2.0) least integer greater than or equal to a real number (MathML 2.0)

### Relations:

 equal not equal greater than less than greater than or equal less than or equal logically equivalent (MathML 2.0) approximately equal (MathML 2.0) the "divides" operator (MathML 2.0)

### Calculus:

 integral derivative, differentiatiom partial derivative lower limit (of integral, sum etc.) upper limit (of integral, sum etc.) bound variable (e.g. for integral) holds the n in "nth derivative" divergence differential operator (MathML 2.0) gradient differential operator (MathML 2.0) curl differential operator (MathML 2.0) Laplacian differential operator (MathML 2.0)

### Theory of Sets:

 union or meet intersection or join is in, is a member is not in, is not a member is a subset is a proper subset is not a subset is not a proper subset set difference cardinality of a set (MathML 2.0) form the Cartesian product of two sets (MathML 2.0)

### Sequences and Series:

 sum terms of a sequence multiply terms in a sequence limiting value of a sequence relation on sequences

### Elementary Classical Functions:

 exponential function (MathML 2.0) natural logarithm logarithm to given base base of the logarithm trig function trig function trig function trig function trig function trig function hyperbolic trig function hyperbolic trig function hyperbolic trig function hyperbolic trig function hyperbolic trig function hyperbolic trig function inverse trig function inverse trig function inverse trig function inverse trig function (MathML 2.0) inverse trig function (MathML 2.0) inverse trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0) inverse hyperbolic trig function (MathML 2.0)

### Statistics:

 mean or average standard deviation variance median mode moment moment about a point (MathML 2.0)

### Linear Algebra:

 vector matrix matrix row determinant transpose select a matrix row or entry vector product (MathML 2.0) scalar product (MathML 2.0) outer product (MathML 2.0)



### Constant and Symbol Elements:

 set of integers (MathML 2.0) set of real numbers (MathML 2.0) set of rational numbers (MathML 2.0) set of natural numbers (MathML 2.0) set of complex numbers (MathML 2.0) set of prime integers (MathML 2.0) base for natural logarithms, approx. 2.7183 (MathML 2.0) square root of -1 (MathML 2.0) placeholder for an ill-defined floating point operation (MathML 2.0) boolean constant (MathML 2.0) boolean constant (MathML 2.0) the empty set (MathML 2.0) Ratio of circumference to diameter for a circle, approx. 3.1416 (MathML 2.0) Euler's constant, approx. 0.5772 (MathML 2.0) Infinity (MathML 2.0)