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Theorem rmdup-del1-del

⊦ rmdup(x) -1l a = rmdup(x -l a)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 19
Used lemmas: del1-n, in-del-new, del-n, in-03, del1-y, del-y, del-e, del1-e,
Used spec theorems:
- list-dup/rm-ifrec
Used simplifier rules:
- list-dup/rmdup-e
- list/c
- list/a
- list/app-08