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Theorem depths-size-one

⊦ # depths(t, i) = 1 ↔ t = Leaf

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: depths-nonnil, depths-node, depths-leaf,
Used spec theorems:
- Used simplifier rules:
  - int-basic2/add-c
  - nat-basic2/one-02
  - nat-basic2/c
  - nat-basic2/a
  - list-data/intlist/l
  - nat-basic2/one-03
  - tree/disj
  - list/intlist/a
  - list/intlist/len
  - list/intlist/len-02