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Theorem iso-sym

⊦ files0 ~ files1 → files1 ~ files0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 9
Used lemmas: getpage, getbyte, stream, files-iso,
Used spec theorems:
- Used simplifier rules:
  - abstract-file/elim
  - stream/buffer-inf/to-inf
  - stream-basic/buffer-inf/inj-02
  - abstract-file/sel-01
  - abstract-file/sel-06
  - abstract-file/sel-02
  - abstract-file/sel-07