cospan

From co- +‎ span.

cospan (plural cospans)

1. (mathematics) The dual of a span.
   • 2016, Kenny Courser, “A bicategory of decorated cospans”, in arXiv‎^[1]:

     This extra structure arises from a lax symmetric monoidal functor ${\displaystyle F\colon \mathbf {C} \to \mathbf {D} }$ ; we use this functor to "decorate" each cospan with apex ${\displaystyle N\in \mathbf {C} }$  with an element of ${\displaystyle F(N)}$ .

• Poncas, capons