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Theorem abs-of-del

⊦ abs-of(of) -- fd = abs-of(of -- fd)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 1
Used lemmas: abs-of-at, abs-of-in,
Used spec theorems:
- store/open-file-handles/k-Extension
Used simplifier rules:
- store/open-file-handles/Del-in
- store/open-files/Del-in
- store/open-file-handles/Del-at
- store/open-files/Del-at