| eqd(sys, cdom(co), sys0) ∧ (contents(exec(sys, co) .1, nam) ≠ contents(sys, nam) ∨ contents(exec(sys0, co) .1, nam) ≠ contents(sys0, nam)) → contents(exec(sys, co) .1, nam) = contents(exec(sys0, co) .1, nam) ⊦ eqd(sys, cdom(co), sys0) ∧ contents(sys, nam) = contents(sys0, nam) ∧ nam ∈ alter(cdom(co)) → contents(exec(sys, co) .1, nam) = contents(exec(sys0, co) .1, nam) |