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When I enter a multiplication sign, I can either use \times or use the unicode character × (U+00D7) directly. Which one should I use? How about less common things like ∞ (infinity, U+221E)? I really like entering the math symbol directly as it is more readable, but some text editors don't support unicode characters well.

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    As you said but some text editors don't support unicode characters, so use \times, \infty, \to and so on. – Sigur Jul 23 '17 at 16:04

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