var M = {
co : function(x) {
    return Math.cos(2*Math.PI*x);
}
,
prime : function() {
    var s = 'rgba(220,220,220,1)';
    var t = 'rgba(180,180,180,1)';
    var n = 120;
    var u = 5;
    var m = 20;
    var i,j,k;
    var a = new Array();
    for(i ...

Multiplication is the repeated addition.
2 + 2 + 2 = 2 × 3

Exponent is the repeated multiplication.
2 × 2 × 2 = 2 ∧ 3

The base of the exponent can be any real number
but the exponent could be only the natural number except 1 by the definition.


Subtrac ...