In mathematics, specifically in abstract algebra, an **opposite ring** is a concept that arises when considering the structure of rings in a different way. If \( R \) is a ring, the **opposite ring** \( R^{op} \) (also sometimes denoted as \( R^{op} \) or \( R^{op} \)) is defined with the same underlying set as \( R \), but with the multiplication operation reversed.
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