© François Le Coat
©Karl Samyn

Last modified :
         26 apr 1998

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 YX&Y
    000
    010
    100
    111
  • | = logic OR
    This operator can be defined by next table :
    X YX|Y
    000
    011
    101
    111
  • ! = logic NOT
    This operator can be defined by next table :
    X!X
    01
    10

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.