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Theorem square-ls-01

⊦ 0 ≤ i ∧ 0 ≤ j → ((i * (i + 1)) / 2 < ((j + 1) * (j + 2)) / 2 ↔ i < j + 1)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 4
Used lemmas: square-ls,
Used spec theorems:
- Used simplifier rules: