© François Le Coat
©Karl Samyn

Last modified :
         28 May 2000


Functions


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A whole list with all the functions suported by Eureka.
ln = natural logarithm
x = ln(ex)
log = base 10 logarithm
x = log(10x)
imaginary unit : i
The imaginary unit is also often written as j (see curves of Bode), especially there were electrical currents are involved in the calculations and parameters. Current has also as symbol i.

The definition of i can be written as follows : i*i = -1.
Another way to see this is like this : sqrt(-1) = i (don't forget this is a faultly defenition because you can't take a sqrt from a negative number.)

Logic Operators :

    & = logic AND
    This operator can be defined by next table :
    X Y X&Y
    0 0 0
    0 1 0
    1 0 0
    1 1 1
    | = logic OR
    This operator can be defined by next table :
    X Y X|Y
    0 0 0
    0 1 1
    1 0 1
    1 1 1
    ! = logic NOT
    This operator can be defined by next table :
    X !X
    0 1
    1 0
Special symbols :
  • !> = not superior to
  • !< = not inferior to
  • // = parallel e.g. R1//R2=R1*R2/(R1+R2)
The constant values :
  • pi = PI = 3.141592654
  • eu = e = 2.718281828
  • i = imaginary unit


[exclamation mark] More info will follow in the next version.