Copy notation

Copy notation is a notation created by the Googology Wiki user, SpongeTechX used to define copied or repeated digits/numbers.

Definition
Copy notation simply defines the amount of digits in a number which are all the same. You can simplify the number \(5,555\) with this notation by using \(n[m]\). n represents the digit you are using, and the m represents the amount of them. In this case, \(5,555\) would be equal to  \(5[4]\) in copy notation because there are four fives. \(8,888,888\) would be equal to \(8[7]\)because there are seven eights.

Basically, \(m\) repeated digits of \(n\) = \(n[m]\) in copy notation.

All of this applies for 2, 3, etc.-digit numbers. \(10[10]\) = \(10,101,010,101,010,101,010\). That is ten tens.

Examples

 * 2[4] = 2,222 or four twos
 * 4[8] = 44,444,444 or eight fours
 * 9[2] = 99 or two nines