eli5: What do you do when you run out of variables?

Question

you refer to variables like “x” “y” “z” so on so forth, but what happens when you run out? Do you go capital do you use a special symbol or something?

In: Mathematics

Answer 1

You trade out the individual variables for a sequence. Instead of a, b, c, …, z, you’d just have a_1, a_2, a_3, …, a_26. Since the subscripts can go as high as you want, you effectively have an infinte number of variables.