What's name of this symbol for denoting class intervals? How is it input in Latex/MathJax?
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$\begingroup$ tex.stackexchange.com As mathjax is basically Latex for JavaScript you can ask this here. $\endgroup$– FerdiCommented Oct 28, 2016 at 6:37
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$\begingroup$ Although asking for the latex is off topic here, asking the name of the symbol and its use is clearly on topic, so I'm inclined to leave this open. $\endgroup$– SilverfishCommented Oct 28, 2016 at 10:25
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1$\begingroup$ I've never seen that symbol used for that purpose before. I wouldn't call it a standard or typical use. On the other hand it does seem reasonably clear (it suggests the half-open intervals $[150,154)$ and so forth), so it doesn't seem like a silly idea. $\endgroup$– Glen_bCommented Oct 28, 2016 at 23:28
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$\begingroup$ @Glen_b, so apparently this is more used here in Brazil... $\endgroup$– Victor AurélioCommented Oct 29, 2016 at 2:30
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2 Answers
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It seems to be called the turnstile symbol, see Wikipedia here. I would have to say that none of the suggested usages there correspond to what you have in your picture. The article also tells you how to get it in Latex by the way.
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As an addition to the answer of mdewey, here is a website where you can draw the symbol you need and get the latex codes for similar looking symbols. It might take 2 or 3 attempts at drawing it, but usually I can find what I need on it:
http://detexify.kirelabs.org/classify.html
