 
 
 
5.17.2  Usual functions
- 
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 
its 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 fractional part,
- trunc takes as 
argument a real number and returns the integer equal to the real without its 
fractional part,
- id is the identity function,
- sq is the square function,
- sqrt is the squareroot function,
- surd takes two arguments, numbers x and
n and returns the nth root of x.
- 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 base 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 cotangent, secant, cosecant function
- asin (or arcsin),
acos (or arccos), 
atan (or arctan), 
acot, asec, acsc are the inverse trigonometric functions (see 
section 5.24.1 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)
 
 
