fact: Definition addℝ_assoc := λ"Cx" λ"Cy" λ"Cz" λ"ε₁" λ"ε₂" λ"q₁" λ"q₂" λ"X+(Y+Z)" λ"(X+Y)+Z" addℝ_Cauchy @ (addℝ_Cauchy @ "Cx" @ "Cy") @ "Cz" @ "ε₁" @ "ε₂" @ "q₁" @ "q₂" @ (addℝ_shift @ "X+(Y+Z)") @ "(X+Y)+Z".
imports: QArith Psatz ClassicalRealizability.Kbase ClassicalRealizability.Rationals ClassicalRealizability.Real_definitions ClassicalRealizability.Real_relations