cokernel

From co- +‎ kernel.

cokernel (plural cokernels)

1. (mathematics, category theory, of a morphism ${\displaystyle f:X\to Y}$ in a category with zero morphisms) The coequalizer of ${\displaystyle f}$ and the zero morphism from ${\displaystyle X}$ to ${\displaystyle Y}$, denoted ${\displaystyle \operatorname {coker} f}$.
   1. (mathematics, category theory) The target of ${\displaystyle \operatorname {coker} f}$, denoted ${\displaystyle \operatorname {Coker} f}$.

• Leckrone