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Proof step 11 from proof valid-group-nodes-shorter-prefix-right (previous step)

valid-group-nodes(gndx) < valid-group-nodes(prefixn(n, gndx)), valid-group-nodes(gndx) < # prefixn(n, gndx + mkgnode(nd, m, boolvar, false) '), valid-group-nodes(gndx) < # prefixn(n, gndx), ∀ n0. valid-group-nodes(gndx) < valid-group-nodes(prefixn(n0, gndx)) ∧ valid-group-nodes(gndx) < # prefixn(n0, gndx) → n0 = 0 ⊦ gndx = [], n = 0

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 4 terms: n

Additional information

Used terms: n