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Proof step 34 from proof rm-allsize (previous step)

a0 ∈ rmdup(z), rmdup(z) = y + a ' + z0, a0 ∈ x0, a ∈ z, a0 ∈ z ⊦ # rmdup(x0) = # rmdup((y0 + y) + z0), a0 ∈ y0, a0 ∈ y, a0 ∈ z0, a ∈ y0, a ∈ x0, a ∈ y, a ∈ z0

User applied rule insert equation

And obtained the following new goals

Proof step 35:
a0 ∈ y + a ' + z0, rmdup(z) = y + a ' + z0, a0 ∈ x0, a ∈ z, a0 ∈ z ⊦ # rmdup(x0) = # rmdup((y0 + y) + z0), a0 ∈ y0, a0 ∈ y, a0 ∈ z0, a ∈ y0, a ∈ x0, a ∈ y, a ∈ z0

Rule argument

pos: left 2 flags:

Proof step 34 from proof rm-allsize (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information