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Theorem square-le-one

⊦ 0 < i → (sqrt(i) ≤ 1 ↔ i < 4)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: square-le-one-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 8
Proof steps: 15
Used lemmas: Square-def, square-not-neg, two-ls-pospos, Sqrt-def, one-01, square-two, square-three,
Used spec theorems:
- int-basic1/ls-rec
Used simplifier rules: