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Theorem notneg

⊦ 0 ≤ i ∧ 0 ≤ j → ¬ i ^ j < 0

Type: A user defined theorem
Validity: The proof is valid.
Features: localsimp,
Comment:
Used by: le-pos-01, ls-pos-02, notneg-02, pot-root-est,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 6
Used lemmas: one-01, Pot-zero, Pot-pos, notone,
Used spec theorems:
- Used simplifier rules: