Contraction of an ideal
= Contraction of an ideal
{title2=$J^c$}
= Contractions of ideals
{synonym}
For a ring homomorphism $f:R\to A$ and an ideal $J\subseteq A$, its contraction is $J^c=f^{-1}(J)$.
= Contraction of an ideal
{title2=$J^c$}
= Contractions of ideals
{synonym}
For a ring homomorphism $f:R\to A$ and an ideal $J\subseteq A$, its contraction is $J^c=f^{-1}(J)$.