∫ Утверждение Mathlib
piecewise_mem_Icc_of_mem_of_mem
Mathlib.Data.Finset.Piecewise
URI: https://scilib.ai/kg/mathlib#Finset.piecewise_mem_Icc_of_mem_of_mem
∫ Утверждение Mathlib
Mathlib.Data.Finset.Piecewise
URI: https://scilib.ai/kg/mathlib#Finset.piecewise_mem_Icc_of_mem_of_mem