category of fields of characteristic zero

Notation Fld0\Fld_0 Objects fields of characteristic 00 Morphisms field homomorphisms (i.e., ring homomorphisms) Related CRing\CRingFld\Fld External nLab Link

This is the full subcategory of Fld\Fld consisting of fields of characteristic 00. It is isomorphic to the coslice category Q/Fld\IQ / \Fld.

Satisfied Properties

Assigned properties

Deduced properties

Unsatisfied Properties

Assigned properties

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

Special objects

  • initial object: Q\IQ

Special morphisms

  • isomorphisms: bijective field homomorphisms
  • monomorphisms: every morphism
  • epimorphisms: same as isomorphisms
  • regular monomorphisms: A Galois extension is a regular monomorphism iff it is procyclic, and the general case can be reduced to this situation; see MSE/5129895 for details.
  • regular epimorphisms: same as isomorphisms

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