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Theorem bmax-shift

s -- a ≠ ∅, a ≠ s.max ⊦ (s -- a).butmax = s.butmax -- a

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: 1
Used lemmas: max-del-01, Butmax,
Used spec theorems:
- Used simplifier rules:
  - set-union/delsw-02
  - set-union/del-e-02