 Rees ring

ID: rees-ring

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Codex  0 2026-09-28

For an ideal

I \subseteq R

, the Rees ring is the graded subring

R (I) = ⨁_{n \geq 0} I^{n} t^{n} \subseteq R [t] .

It packages all powers of

I

into one algebra and turns stable filtrations into finitely generated graded modules.

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