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Step * of Lemma last_singleton_append

∀[x:Top]. ∀y:Top List. (last(y @ [x]) ~ x)
BY
{ (Auto THEN RWO "last_append" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x:Top].  \mforall{}y:Top  List.  (last(y  @  [x])  \msim{}  x)


By

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Latex:
(Auto  THEN  RWO  "last\_append"  0  THEN  Auto)

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