  This study first derives a general and analytical expression of AFA (Additive
Feature Attribution) in terms of the kernel in LIME (Local Interpretable
Model-agnostic Explanations). Then, we propose some new AFAs that have
appropriate properties of kernels or that coincide with the LS prenucleolus in
cooperative game theory. We also revisit existing AFAs such as SHAP (SHapley
Additive exPlanations) and re-examine the properties of their kernels.
