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Revision difference : dense ideal
Version 8 Version 7
Given a commutative ring $R$, an ideal/subset $I\subset R$ is said to be \PMlinkescapetext{\emph{dense}} iff its annihilator is $\{0\}$, in other words Given a commutative ring $R$, an ideal/subset $I\subset R$ is said to be \PMlinkescapetext{\emph{dense}} iff its annihilator is $\{0\}$, in other words
$$\mathrm{Ann}(I)=\{0\}$$ $$\mathrm{Ann}(I)=\{0\}$$
We can similarly define \PMlinkescapetext{\emph{right dense} and {left dense}} in the case of noncommutative rings. We can similarly define \PMlinkescapetext{\emph{right dense}} and {left dense} in the case of noncommutative rings.