In mathematics, a field is pseudo algebraically closed if it satisfies certain properties which hold for algebraically closed fields. The concept was introduced by James Ax in 1967.[1]

Formulation

A field K is pseudo algebraically closed (usually abbreviated by PAC[2]) if one of the following equivalent conditions holds:

  • Each absolutely irreducible variety defined over has a -rational point.
  • For each absolutely irreducible polynomial with and for each nonzero there exists such that and .
  • Each absolutely irreducible polynomial has infinitely many -rational points.
  • If is a finitely generated integral domain over with quotient field which is regular over , then there exist a homomorphism such that for each .

Examples

Properties

References

  1. 1 2 Fried & Jarden (2008) p.218
  2. 1 2 Fried & Jarden (2008) p.192
  3. Fried & Jarden (2008) p.449
  4. Fried & Jarden (2008) p.196
  5. Fried & Jarden (2008) p.380
  6. Fried & Jarden (2008) p.209
  7. 1 2 Fried & Jarden (2008) p.210
  8. Fried & Jarden (2008) p.462
  • Fried, Michael D.; Jarden, Moshe (2008). Field arithmetic. Ergebnisse der Mathematik und ihrer Grenzgebiete. 3. Folge. Vol. 11 (3rd revised ed.). Springer-Verlag. ISBN 978-3-540-77269-9. Zbl 1145.12001.
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