this post was submitted on 27 Jun 2024
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ISO is not a source for mathematical definitions
It's a definition from a well-respected global standards organization. Can you name a source that would provide a more authoritative definition than the ISO?
There's no universally correct definition for what the ≈ symbol means, and if you write a paper or a proof or whatever, you're welcome to define it to mean whatever you want in that context, but citing a professional standards organization seems like a pretty reliable way to find a commonly-accepted and understood definition.
Tbh I'm just impressed you:
A) knew there was an iso standard
iii) posted it in respectful manner, and
e) are correct.