Nilradical: Difference between revisions
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* It is the set of [[nilpotent element]]s | * It is the set of [[nilpotent element]]s | ||
==Equivalence of definitions=== | ===Equivalence of definitions=== | ||
For a proof of the equivalence of definitions, see [[nilradical equals intersection of prime ideals]] (the remaining equivalences are direct from definitions). | For a proof of the equivalence of definitions, see [[nilradical equals intersection of prime ideals]] (the remaining equivalences are direct from definitions). | ||
Revision as of 23:55, 8 February 2008
This article defines an ideal-defining function, viz a rule that inputs a commutative unital ring and outputs an ideal of that ring
Definition
Symbol-free definition
The nilradical of a commutative unital ring is defined as the subset that satisfies the following equivalent conditions:
- It is the intersection of all prime ideals
- It is the intersection of all radical ideals
- It is the radical of zero.
- It is the set of nilpotent elements
Equivalence of definitions
For a proof of the equivalence of definitions, see nilradical equals intersection of prime ideals (the remaining equivalences are direct from definitions).