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Theorem zero-ge-case

⊦ 0 ≤ i * j ↔ i = 0 ∨ j = 0 ∨ 0 ≤ i ∧ 0 ≤ j ∨ i ≤ 0 ∧ j ≤ 0

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: 1
Proof steps: 2
Used lemmas: commutativity, associativity, zero-ge-03, zero-ge,
Used spec theorems:
- Used simplifier rules: