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d2jsp Forums > Off-Topic > General Chat > Homework Help > Never Seen This Sideways Pitchfork Head Symbol > Anyone Know
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#1
Sep 15 2013 06:56pm
In calc 5 and I've never come across this symbol before...

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#2
Sep 15 2013 07:00pm
It's set theory, it means "in" and the boldface R is the set of all real numbers I believe
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#3
Sep 15 2013 07:04pm
X ∈ R means X is an element of the set R, where R is the set of all real numbers

This post was edited by Simens on Sep 15 2013 07:04pm
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#4
Sep 15 2013 07:12pm
Ah alright. Thanks
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