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Theorem countrefs-lastn-02

⊦ r ∈ refs1 ∧ ¬ r ∈ refs ∧ # refs = 2 + n * m + m0 → lastn(1 + n * m, refs) ≠ r0 ' + refs1

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: multi-at-other,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas:
Used spec theorems:
- list-del/references/lastn-neq-04
Used simplifier rules:
- nat/lep-01
- nat-basic2/z-01
- nat/lels
- nat/succ-01
- list/references/in-17
- list/references/in-append
- list/references/a
- list/references/in-14
- nat-basic2/c
- nat-basic2/a
- nat-mult/mult-c
- nat-mult/mult-a