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Theorem TOPRED-lem

⊦ 〈TOPRED(t; tn)〉 (tn = none ⊃ ¬ (∃ t0. t =>top t0); t =>top tn .t)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment: the ⊃ operator is an if then else.
Used by: RED1-lem,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 33
Used lemmas: decl-04,
Used spec theorems:
- reduce/topred-def
Used simplifier rules: