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# kernel(MackeyFunctorHomomorphism) -- kernel of a Mackey functor homomorphism

- Function: kernel
- Usage:
    `kernel f`
- Inputs:
  - f, a Mackey Functor homomorphism,
- Optional inputs:
  - DegreeLimit => ..., default value {}
  - Strategy => ..., default value {}
  - SubringLimit => ..., default value infinity
- Outputs:
  - a C_p Mackey Functor, the kernel of the homomorphism f

## See also

- the abelian category of Mackey functors -- background on the category of Mackey functors and how to code within it
- MackeyFunctorHomomorphism -- the class of Mackey functor homomorphisms

## Ways to use this method:

- kernel(MackeyFunctorHomomorphism) -- kernel of a Mackey functor homomorphism

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/CpMackeyFunctors/Documentation/AbelianCategoryDoc.m2:130:0.