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Theorem zero-not

⊦ abs(r) < r0 ∧ r0 ≤ abs(r1) → r + r1 ≠ 0.r

Type: A user defined theorem
Validity: The proof is valid.
Features:
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: 5
Used lemmas: abs-06, Abs-pos, abs-16, Abs-neg, le-def,
Used spec theorems:
- Used simplifier rules: