Prove:

((∀X)∧(X∈integers)∧(∀Y)∧(Y∈integers)∧((X*Y) =0)⇒((X=0)∨(Y=0)))

Given:

AxiomDefinition
zero_times

((∀X)∧(X∈integers)∧((X*0)=0))

division

((∀X)∧(X∈integers)∧(∀Y)∧(Y∈integers)∧( ∀Z)∧(Z∈integers)∧((X*Y)=(X*Z))∧(X≠0)⇒(Y =Z))