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**[SOLVED] Quick, simple question on sets**

**1. Homework Statement**

A - B is the difference

A u B is the union

A n B is the intersection

A (+) B is what?

I would google this, but I haven't a clue what the symbol or function is called. It's supposed to be a +, inside a circle.

Can someone tell me what this symbol means, or at least tell me what it's called, so I can look it up myself?

Edit: In TeX, it's this: [tex]\oplus[/tex]

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