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Theorem sw

⊦ a ≠ b → st[b, d] -- a = (st -- a)[b, d]

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: 4
Used lemmas: In-insert, At-same, Del-at-strong, Del-in, At-other, lookupisempty, in-neq, Del-notin, Extension,
Used spec theorems:
- Used simplifier rules: