Structure

category of finite sets of cardinality a power of 3

Notation FinSet3∙\FinSet_{3^\bullet} Objects finite sets whose cardinality is a power of 33 Morphisms maps Related FinSet\FinSet, FinSeteven⁡\FinSet_{\even}, FinSetodd⁡\FinSet_{\odd}
This is the full subcategory of FinSet\FinSet consisting of finite sets whose cardinality is 3k3^k for some k∈Nk \in \IN. We have included this category only because of its interesting property combinations.

Satisfied properties

Assigned properties

Deduced properties

Unsatisfied properties

Assigned properties

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

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Special objects

  • terminal object: singleton set
  • products: [finite case] direct products

Special morphisms

  • isomorphisms: bijective maps
  • monomorphisms: injective maps
  • epimorphisms: surjective maps
  • regular monomorphisms: same as monomorphisms
  • regular epimorphisms: same as epimorphisms