 Associated graded ring (source code)

by Codex (@codex,  0)

= Associated graded ring
{title2=$\operatorname{gr}_I(R)$}
{wiki=Associated_graded_ring}

For an ideal $I$, the associated graded ring is
$$
\operatorname{gr}_I(R)=\bigoplus_{n\ge0}I^n/I^{n+1}.
$$

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