I'm looking at a condition in a maths paper that I don't understand, essentially it is:(adsbygoogle = window.adsbygoogle || []).push({});

x ∈ R ⊕ R^{⊥}

R is a set I think, but I'm not sure what the perpendicular symbol means.

Also am I correct in thinking the circled plus means that x must be in either R or R^{⊥}(but not both)?

Thanks

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# What does A^(⊥) mean?

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