12many – Generalising mathematical index sets

In the discrete branches of mathematics and the computer sciences, it will only take some seconds before you're faced with a set like {1,...,m}. Some people write $1\ldotp\ldotp m$, others $\{j:1\leq j\leq m\}$, and the journal you're submitting to might want something else entirely. The 12many package provides an interface that makes changing from one to another a one-line change.

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