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Factors of Fields

Published online by Cambridge University Press:  20 November 2018

James K. Deveney
Affiliation:
Virginia Commonwealth University, Richmond, VA 23284
Joe Yanik
Affiliation:
Division of Mathematical Sciences, Emporia State University, Emporia, Kansas 66801
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Abstract

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Let L be a finitely generated extension of a field k. L is a k-rational factor if there is a field extension K of k such that the total quotient ring of L ꕕk K is a rational (pure transcendental) extension of K. We present examples of non-rational rational factors and explicitly determine both factors.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1990

References

1. Bass, H., Algebraic K-theory, Benjamin, New York, 1968.Google Scholar
2. Beauville, A., Colliot-Thelene, J., Sansuc, J., and Swinnerton-Dyer, , Variétés stablement rationnelles non rationnelles, Ann. of Math., 121, 293-318 (1985).Google Scholar
3. Colliot-Thelene, J., Principal homogeneous spaces under flasque tori: applications.J. of Algebra 106, 148-205 (1987).Google Scholar
4. Lenstra, H. W., Rational functions invariant under a finite abelian group, Inventiones Math. 25, 299325 (1974).Google Scholar
5. Miyata, T., Invariants of certain groups, Nagoya Math. J. 41, 6973 (1971).Google Scholar
6. Saltman, D., Retract rational fields and cyclic Galois extensions, Israel J. Math. 47, 165215 (1984).Google Scholar
7. Saltman, D., Multiplicative field invariants, J. of Algebra 106, 221-238 (1987).Google Scholar
8. Swan, R., Invariant rational functions and a problem of Steenrod, Inventiones Math., 7, 148158 (1969).Google Scholar