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Theorem sum-append

⊦ Σ(nats + nats0) = Σ nats + Σ nats0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 3
Used lemmas: sum-rec, sum-empty,
Used spec theorems:
- Used simplifier rules:
  - nat-basic2/eq-01
  - list/natlista/c
  - list/natlista/Nil
  - list/natlista/a
  - nat-basic2/z
  - nat-basic2/a
  - nat-basic2/c