Step
*
2
1
of Lemma
qsum-linearity2
1. ∀d:ℕ
∀[a,b:ℤ].
∀[X,Y:{a..b-} ⟶ ℚ]. (Σa ≤ i < b. X[i] + Y[i] = (Σa ≤ i < b. X[i] + Σa ≤ i < b. Y[i]) ∈ ℚ) supposing (b - a) ≤ d
2. a : ℤ
3. b : ℤ
4. X : {a..b-} ⟶ ℚ
5. Y : {a..b-} ⟶ ℚ
6. a ≤ b
⊢ Σa ≤ i < b. X[i] + Y[i] = (Σa ≤ i < b. X[i] + Σa ≤ i < b. Y[i]) ∈ ℚ
BY
{ (InstHyp [⌜b - a⌝] 1⋅ THEN Auto) }
Latex:
Latex:
1. \mforall{}d:\mBbbN{}
\mforall{}[a,b:\mBbbZ{}].
\mforall{}[X,Y:\{a..b\msupminus{}\} {}\mrightarrow{} \mBbbQ{}]. (\mSigma{}a \mleq{} i < b. X[i] + Y[i] = (\mSigma{}a \mleq{} i < b. X[i] + \mSigma{}a \mleq{} i < b. Y[i]))
supposing (b - a) \mleq{} d
2. a : \mBbbZ{}
3. b : \mBbbZ{}
4. X : \{a..b\msupminus{}\} {}\mrightarrow{} \mBbbQ{}
5. Y : \{a..b\msupminus{}\} {}\mrightarrow{} \mBbbQ{}
6. a \mleq{} b
\mvdash{} \mSigma{}a \mleq{} i < b. X[i] + Y[i] = (\mSigma{}a \mleq{} i < b. X[i] + \mSigma{}a \mleq{} i < b. Y[i])
By
Latex:
(InstHyp [\mkleeneopen{}b - a\mkleeneclose{}] 1\mcdot{} THEN Auto)
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