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Theorem inf-not-toinf-exceptinf

⊦ ⌜nf⌝ = σ to∞ n∞ ↔ ¬ ¬(n∞ = ∞ ∧ ⌜nf⌝ = σ)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: fin-toinf,
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: inf-not-to, toinf-fin, toinf-inf,
Used spec theorems:
- Used simplifier rules:
  - stream-basic/inj-01