How to read $\cup_{j,k=1}^{\infty} I_{k,j}$, which is $\cup_{j=1}^{\infty} \cup_{k=1}^{\infty} I_{k,j}$?
They are the same set based on my notes, but I don't understand how to read the former syntax.
2026-04-12 19:53:11.1776023591
How to read $\cup_{j,k=1}^{\infty} I_{k,j}$, which is $\cup_{j=1}^{\infty} \cup_{k=1}^{\infty} I_{k,j}$?
36 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in ELEMENTARY-SET-THEORY
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