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by marssaxman 3378 days ago
I took three semesters of math in college and don't remember any of those symbols.
1 comments
ajarmst 3378 days ago
If you took three semesters of post-secondary maths and never encountered "∈", you should ask for your money back.
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marssaxman 3378 days ago
I don't know whether I encountered it. Perhaps I just forgot. Either way, it hasn't been a notation used in real life.
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