6.1.2 Morphisms of Pointed Sets

A morphism of pointed sets1,2 is equivalently:

  • A morphism of $\mathbb {E}_{0}$-monoids in $(\mathrm{N}_{\bullet }(\mathsf{Sets}),\mathrm{pt})$.

  • A morphism of pointed objects in $(\mathsf{Sets},\mathrm{pt})$.


  1. 1Further Terminology: Also called a pointed function.
  2. 2Further Terminology: In the context of monoids with zero as models for $\mathbb {F}_{1}$-algebras, morphisms of pointed sets are also called morphism of $\mathbb {F}_{1}$-modules.

In detail, a morphism of pointed sets $f\colon (X,x_{0})\to (Y,y_{0})$ is a morphism of sets $f\colon X\to Y$ such that the diagram

commutes, i.e. such that

\[ f(x_{0}) = y_{0}. \]


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