## Tag `00NK`

Chapter 10: Commutative Algebra > Section 10.104: Catenary rings

Lemma 10.104.7. Any quotient of a catenary ring is catenary. Any quotient of a Noetherian universally catenary ring is universally catenary.

Proof.Let $A$ be a ring and let $I \subset A$ be an ideal. The description of $\mathop{\mathrm{Spec}}(A/I)$ in Lemma 10.16.7 shows that if $A$ is catenary, then so is $A/I$. The second statement is a special case of Lemma 10.104.5. $\square$

The code snippet corresponding to this tag is a part of the file `algebra.tex` and is located in lines 24291–24296 (see updates for more information).

```
\begin{lemma}
\label{lemma-quotient-catenary}
Any quotient of a catenary ring is catenary.
Any quotient of a Noetherian universally catenary ring is
universally catenary.
\end{lemma}
\begin{proof}
Let $A$ be a ring and let $I \subset A$ be an ideal.
The description of $\Spec(A/I)$ in Lemma \ref{lemma-spec-closed}
shows that if $A$ is catenary, then so is $A/I$.
The second statement is a special case of
Lemma \ref{lemma-universally-catenary}.
\end{proof}
```

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