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Theorem zero-le-01

⊦ r < 0.r → (r * r0 ≤ 0.r ↔ 0.r ≤ r0)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by: square-le, square-lez-01, zero-gr-case, zero-le-03, zero-le-case,
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: zero-gr-01, mult-com, mult-ass, minus-left, zero-le,
Used spec theorems:
- Used simplifier rules: