Step
*
of Lemma
small-sparse-rep
∀r:{-2..3-}
(∃L:{-1..2-} List [((r = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))])
BY
{ TACTIC:((D 0 THENA Auto) THEN IntSegCases (-1)) }
1
1. r : ℤ
2. r = (-2) ∈ ℤ
⊢ ∃L:{-1..2-} List [(((-2) = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))]
2
1. r : ℤ
2. r = (-1) ∈ ℤ
⊢ ∃L:{-1..2-} List [(((-1) = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))]
3
1. r : ℤ
2. r = 0 ∈ ℤ
⊢ ∃L:{-1..2-} List [((0 = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))]
4
1. r : ℤ
2. r = 1 ∈ ℤ
⊢ ∃L:{-1..2-} List [((1 = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))]
5
1. r : ℤ
2. r = 2 ∈ ℤ
⊢ ∃L:{-1..2-} List [((2 = Σi<||L||.L[i]*2^i ∈ ℤ)
∧ (||L|| = 2 ∈ ℤ)
∧ (∀i:ℕ||L|| - 1. ((L[i] = 0 ∈ ℤ) ∨ (L[i + 1] = 0 ∈ ℤ))))]
Latex:
Latex:
\mforall{}r:\{-2..3\msupminus{}\}
(\mexists{}L:\{-1..2\msupminus{}\} List [((r = \mSigma{}i<||L||.L[i]*2\^{}i)
\mwedge{} (||L|| = 2)
\mwedge{} (\mforall{}i:\mBbbN{}||L|| - 1. ((L[i] = 0) \mvee{} (L[i + 1] = 0))))])
By
Latex:
TACTIC:((D 0 THENA Auto) THEN IntSegCases (-1))
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