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nil and nilpotent ideals (Definition)

An element $ x$ of a ring is nilpotent if $ x^n = 0$ for some positive integer $ n$.

A ring $ R$ is nil if every element in $ R$ is nilpotent. Similarly, a one- or two-sided ideal is called nil if each of its elements is nilpotent.

A ring $ R$ [resp. a one- or two sided ideal $ A$] is nilpotent if $ R^n = 0$ [resp. $ A^n = 0$] for some positive integer $ n$.

A ring or an ideal is locally nilpotent if every finitely generated subring is nilpotent.

The following implications hold for rings (or ideals):

nilpotent$\displaystyle \quad\Rightarrow$   locally nilpotent$\displaystyle \quad\Rightarrow$   nil



"nil and nilpotent ideals" is owned by mclase.
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See Also: Koethe conjecture

Also defines:  nil, nil ring, nil ideal, nil right ideal, nil left ideal, nil subring, nilpotent, nilpotent element, nilpotent ring, nilpotent ideal, nilpotent right ideal, nilpotent left ideal, nilpotent subring, locally nilpotent, locally nilpotent ring, locally nilpotent ideal, locally nilpotent right ideal, locally nilpotent left ideal, locally nilpotent subring

Attachments:
properties of nil and nilpotent ideals (Result) by mclase
upper nilradical (Definition) by CWoo
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Cross-references: implications, subring, finitely generated, ideal, two-sided ideal, integer, positive, ring
There are 20 references to this entry.

This is version 3 of nil and nilpotent ideals, born on 2002-12-08, modified 2003-09-04.
Object id is 3690, canonical name is NilAndNilpotentIdeals.
Accessed 20194 times total.

Classification:
AMS MSC16N40 (Associative rings and algebras :: Radicals and radical properties of rings :: Nil and nilpotent radicals, sets, ideals, rings)

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