nLab
ring extension

Context

Cohomology

cohomology

Special and general types

Special notions

Variants

Extra structure

Operations

Theorems

Contents

Idea

The analog of group extensions for rings, classified by an analog of Schreier theory.

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Properties

Everett’s theorem

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References

A classical textbook account is in paragraphs 52-54 of

  • Rédei, Algebra (1954) (web).

A more modern account is in

  • M. Petrich, Ideal extensions of rings, Acta Mathematica Hungaria, volume 45, numbers 3-4 (1985)

See also

Revised on November 26, 2013 10:29:19 by Urs Schreiber (188.200.54.65)