# Definition:Descending Chain Condition

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## Definition

Let $A$ be a commutative ring with unity.

Let $M$ be an $A$-module.

Let $(D,\supseteq)$ be a set of submodules of $M$ ordered by inclusion.

Then the hypothesis

Every increasing sequence $N_1 \supseteq N_2 \supseteq N_3 \supseteq \cdots$ with $N_i \in D$ eventually terminates: there is $k \in \N$ such that $N_k = N_{k+1} = \cdots$

is called the descending chain condition on the submodules in $D$.