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Theorem dlls-unfold-head

x ≠ [] ⊦ (dlls(r, r0, r2, x) * hP)(h) ↔ (∃ a, y, r1. (r => mknode(r0, a, r1) * dlls(r1, r, r2, y) * hP)(h) ∧ x = a ' + y)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

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Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 7
Used lemmas: dlls-rec,
Used spec theorems:
- list/elim-first
Used simplifier rules: