Suppose I have a matrix with 3 columns

```
10             10                       10
8              8                        8
9              9                        9
7              7                        7
5              5                        5
4              4                        4
3              3                        3
6              6                        6
2              2                        2
1              1                        1

```

What would be the fastest way to check that all the columns are identical? I can do something like `all` or `identical` to check any two and then keep collapsing with the next set but is there anything more clever?

Ideally, I would like a solution that is independent of the number of columns.