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How to work without an identity element when you clearly need it
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If you don't have an identity element, a set of local units is more than enough
Decompose your ring using idempotents
How to work without an identity element when you clearly need it
Ring theory front page
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Finding an interval for rational numbers with a high denominator
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Angela, I think you missed
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covering a disc
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Only if squares are of the
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Squares?
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Examples in complexity theory
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