Centre of a ring: Difference between revisions

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In ring theory, the centre of a ring is the set of elements which commute with every element of the ring:

Z(R)=\{x\in R:\forall r\in R,xr=rx\}.\,

The centre is a subring.

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	In [[ring theory]], the '''centre of a ring''' is the set of elements which commute with every element of the ring:		In [[ring theory]], the '''centre of a ring''' is the set of elements which commute with every element of the ring: