Step
*
1
1
of Lemma
select-data-stream
1. L : Top List
2. P : Top
3. i : ℕ
4. i < ||L||
⊢ snd(P*(firstn(upto(||L||)[i];L))(L[upto(||L||)[i]])) ~ snd(P*(firstn(i;L))(L[i]))
BY
{ Subst ⌈upto(||L||)[i] ~ i⌉ 0⋅ }
1
.....equality.....
1. L : Top List
2. P : Top
3. i : ℕ
4. i < ||L||
⊢ upto(||L||)[i] ~ i
2
1. L : Top List
2. P : Top
3. i : ℕ
4. i < ||L||
⊢ snd(P*(firstn(i;L))(L[i])) ~ snd(P*(firstn(i;L))(L[i]))
Latex:
Latex:
1. L : Top List
2. P : Top
3. i : \mBbbN{}
4. i < ||L||
\mvdash{} snd(P*(firstn(upto(||L||)[i];L))(L[upto(||L||)[i]])) \msim{} snd(P*(firstn(i;L))(L[i]))
By
Latex:
Subst \mkleeneopen{}upto(||L||)[i] \msim{} i\mkleeneclose{} 0\mcdot{}
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