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Step * 1 1 of Lemma upto_decomp2

.....equality..... 
1. n : ℕ+
2. upto(n) ~ upto(1) @ map(λx.(x + 1);upto(n - 1))
⊢ upto(1) ~ [0]
BY
{ RepeatFor 2 ((RW (SubC (TagC (mk_tag_term 15))) 0 THEN SqEqCD)) }

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Latex:

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Latex:
.....equality..... 
1.  n  :  \mBbbN{}\msupplus{}
2.  upto(n)  \msim{}  upto(1)  @  map(\mlambda{}x.(x  +  1);upto(n  -  1))
\mvdash{}  upto(1)  \msim{}  [0]


By

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Latex:
RepeatFor  2  ((RW  (SubC  (TagC  (mk\_tag\_term  15)))  0  THEN  SqEqCD))

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