Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-23T04:51:41.959Z Has data issue: false hasContentIssue false

Non-Normal Galois Theory forNon-Commutative and Non-semisimple Rings

Published online by Cambridge University Press:  20 November 2018

Tadasi Nakayama*
Affiliation:
Nagoya University
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The purpose of the present work is to give, as a continuation of the writer's study of Galois theory for general rings ([8], [9], [10]), a kind of Galois theory for general, non-commutative and non-semisimple rings, which includes, at least in its main features, the Kaloujnine-Jacobson Galois theory of non-normal fields ([3]; cf. [4], [5]). To deal with the non-commutativity we bring to the fore certain double-moduli rather than self-composites, while the non-semisimplicity is manipulated by the method and idea used in the writer's above mentioned study on (normal) Galois theory and commuter systems of nonsemisimple rings. (For the normal Galois theory of rings cf. [1], [2], [6], [7], [11], besides the above.) Some of our arguments may even serve to make some simplification in Jacobson's treatment of ordinary fields.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1951

References

[1] Azumaya, G., Galois theory of uni-serial rings, J. Math. Soc. Japan, vol. 1 (1949).Google Scholar
[2] Jacobson, N., The fundamental theorem of Galois theory for quasifields, Ann. Math., vol. 41 (1940).Google Scholar
[3] Jacobson, N., An extension of Galois theory to non-normal and non-separable fields, Amer. J. Math., vol. 66 (1944).Google Scholar
[4] Jacobson, N., Relations between the composites of a field and those of a subfield, Amer. J. Math., vol. 66 (1944).Google Scholar
[5] Jacobson, N., Galois theory of purely inseparable fields of exponent one, Amer. J. Math., vol. 66 (1944).Google Scholar
[6] Jacobson, N., Note on division rings, Amer. J. Math., vol. 69 (1947).Google Scholar
[7] Nakayama, T., Semilinear normal basis for quasifields, Amer. J. Math., vol. 71 (1949).Google Scholar
[8] Nakayama, T., Galois theory for general rings with minimum condition, J. Math. Soc. Japan, vol. 1 (1949).Google Scholar
[9] Nakayama, T., Commuter systems in a ring with radical, Duke Math. J., vol. 16 (1949).Google Scholar
[10] Nakayama, T., Generalized Galois theory for rings with minimum condition, in Amer. J. Math. Google Scholar
[11] Nakayama, T. and Azumaya, G., On irreducible rings, Ann. Math., vol. 48 (1947).Google Scholar