Index

Logical functions
In arguments and results of logical functions 1 stands for TRUE, 0 stands for FALSE.

Function

Value

Value of

is

or(a,b)

Logical "OR"

or(0,1), or(1,0), or(1,1)

1

   

or(0,0)

0

and(a,b)

Logical "AND"

and(0,0), and(0,1), and(1,0)

0

   

and(1,1)

1

not(a)

Logical "NOT"

not(1)

0

   

not(0)

1

You can use logical and comparison function to construct graphs, defined by
different formulas for different parts of domain. For example,
and(ge(x,0),le(x,1))
presents a function, equal to 1 if x in [0,1], and 0 otherwise.