`max`takes as argument two real numbers and returns their maximum,`min`takes as argument two real numbers and returns their minimum,`abs`takes as argument a complex number and returns the modulus of the complex parameter (the absolute value if the complex is real),`sign`takes as argument a real number and returns its sign (+1 if it is positive, 0 if it is null, and -1 if it is negative),`floor`(or`iPart`) takes as argument a real number*r*, and returns the largest integer*r*,`round`takes as argument a real number and returns it's nearest integer,`ceil`or`ceiling`takes as argument a real number and returns the smallest integer*r*`frac`(or`fPart`) takes as argument a real number and returns its fractionnal part,`trunc`takes as argument a real number and returns the integer equal to the real without its fractionnal part,`id`is the identity function,`sq`is the square function,`sqrt`is the squareroot function,`exp`is the exponential function,`log`or`ln`is the natural logarithm function,`log10`is the base-10 logarithm function,`logb`is the logarithm function where the second argument is the basis of the logarithm:`logb(7,10)=log10(7)=log(7)/log(10)`,`sin`(resp.`cos`,`tan`) is the sinus function, cosinus function, tangent function,`cot, sec, csc`are the cotangeant, secant, cosecant function`asin`(or`arcsin`),`acos`(or`arccos`),`atan`(or`arctan`),`acot, asec, acsc`are the inverse trigonometric functions (see section 1.21.1 for more info on trigonometric functions)`sinh`(resp.`cosh`,`tanh`) is the hyperbolic sinus function, cosinus function, tangent function,`asinh`or`arcsinh`(resp`acosh`or`arccosh`,`atanh`or`arctanh`) is the inverse function of`sinh`(resp`cosh`,`tanh`)