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Theorem root-abs

⊦ 0 ≤ i → abs(sqrt(i)) = sqrt(i)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: inverse-ii, one-01, root-elim, root-nls, sqrt-estimate, square-three, square-two,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: square-not-neg,
Used spec theorems:
- Used simplifier rules:
  - int-abs/lels-01
  - int-abs/abs-18