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Proofgold Proof

pf
Let x0 of type ιο be given.
Assume H0: x0 0.
Assume H1: ∀ x1 . x1setminus omega 1x0 x1.
Assume H2: ∀ x1 . x1setminus omega 1x0 (minus_SNo x1).
Claim L3: ∀ x1 . x1omegax0 x1
Let x1 of type ι be given.
Assume H3: x1omega.
Apply xm with x1 = 0, x0 x1 leaving 2 subgoals.
Assume H4: x1 = 0.
Apply H4 with λ x2 x3 . x0 x3.
The subproof is completed by applying H0.
Assume H4: x1 = 0∀ x2 : ο . x2.
Apply H1 with x1.
Apply setminusI with omega, 1, x1 leaving 2 subgoals.
The subproof is completed by applying H3.
Assume H5: x11.
Apply H4.
Apply cases_1 with x1, λ x2 . x2 = 0 leaving 2 subgoals.
The subproof is completed by applying H5.
Let x2 of type ιιο be given.
Assume H6: x2 0 0.
The subproof is completed by applying H6.
Claim L4: ∀ x1 . x1omegax0 (minus_SNo x1)
Let x1 of type ι be given.
Assume H4: x1omega.
Apply xm with x1 = 0, x0 (minus_SNo x1) leaving 2 subgoals.
Assume H5: x1 = 0.
Apply H5 with λ x2 x3 . x0 (minus_SNo x3).
Apply minus_SNo_0 with λ x2 x3 . x0 x3.
The subproof is completed by applying H0.
Assume H5: x1 = 0∀ x2 : ο . x2.
Apply H2 with x1.
Apply setminusI with omega, 1, x1 leaving 2 subgoals.
The subproof is completed by applying H4.
Assume H6: x11.
Apply H5.
Apply cases_1 with x1, λ x2 . x2 = 0 leaving 2 subgoals.
The subproof is completed by applying H6.
Let x2 of type ιιο be given.
Assume H7: x2 0 0.
The subproof is completed by applying H7.
Apply unknownprop_2504c05a08587fe0873ed45685efc417625f0a904281d653d757d643896f9a70 with x0 leaving 2 subgoals.
The subproof is completed by applying L3.
The subproof is completed by applying L4.