Saturday, 14 August 2004 02:38


I send you the definition of a function, should you find it interesting.


        n
       ---
       \           |       ___           |
O(n) = /   floor ( | cos ( //  * n / m ) | )
       ---         |                     |
       m=1


O(n) represents the quantity of divisors of the positive integer n.
The definition of prime number implies that if n is a prime then O(n) is
equal to 2 otherwise it is not.

To better interpret this message you should render it with a fixed-width
font. However I provide an ECMA-262 definition, too.


var O
O = function ( n )
{
    var Quantity
    var m
    Quantity = 0
    for ( m = 1 ; m <= n ; ++ m )
        Quantity += Math . floor ( Math . abs ( Math . cos ( Math . PI *
n / m ) ) )
    return Quantity
}


Ciao.