CatDat

category of fields

This is a typical example of a bad category of good objects.

Satisfied Properties

Properties from the database

Deduced properties

Unsatisfied Properties

Properties from the database

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

Special objects

Special morphisms

  • isomorphisms: bijective field homomorphisms
  • monomorphisms: every morphism
  • epimorphisms: purely inseparable homomorphisms
  • regular monomorphisms: A Galois extension is a regular monomorphism iff it is procyclic, and the general case can be reduced to this situation; see the reference for details.
  • regular epimorphisms: same as isomorphisms

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