What does “∈” mean?

I have started seeing the “∈” symbol in math. What exactly does it mean?

I have tried googling it but google takes the symbol out of the search.

Answer

means ‘(is) an element of’

For instance, ‘Let aA‘ means ‘Let a be an element of A

http://en.wikipedia.org/wiki/Element_(mathematics) might help you too

Attribution
Source : Link , Question Author : Locke , Answer Author : Hippalectryon

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