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Subfield (mathematics)

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This is an old revision of this page, as edited by Charles Matthews (talk | contribs) at 09:21, 10 November 2003. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

In abstract algebra a subfield is a subset of a field which, together with the additive and multiplicative operators restricted to it, is a field in its own right. If K is a subfield of L, then L is said to be a field extension of K: see the latter article.

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