Step
*
1
1
1
of Lemma
rat-zero-cases
1. x : ℤ × ℕ+
2. TERMOF{rat-rleq-cases-ext:o, \\v:l} <0, 1> x ∈ (↓ratreal(<0, 1>) ≤ ratreal(x)) ∨ (↓ratreal(x) ≤ ratreal(<0, 1>))
⊢ (↓ratreal(<0, 1>) ≤ ratreal(x)) ∨ (↓ratreal(x) ≤ ratreal(<0, 1>))
BY
{ D 1 }
1
1. x1 : ℤ
2. x2 : ℕ+
3. TERMOF{rat-rleq-cases-ext:o, \\v:l} <0, 1> <x1, x2> ∈ (↓ratreal(<0, 1>) ≤ ratreal(<x1, x2>)) ∨ (↓ratreal(<x1, x2>) ≤ \000Cratreal(<0, 1>))
⊢ (↓ratreal(<0, 1>) ≤ ratreal(<x1, x2>)) ∨ (↓ratreal(<x1, x2>) ≤ ratreal(<0, 1>))
Latex:
Latex:
1. x : \mBbbZ{} \mtimes{} \mBbbN{}\msupplus{}
2. TERMOF\{rat-rleq-cases-ext:o, \mbackslash{}\mbackslash{}v:l\} ɘ, 1> x \mmember{} (\mdownarrow{}ratreal(ɘ, 1>) \mleq{} ratreal(x)) \mvee{} (\mdownarrow{}ratreal(x) \mleq{} r\000Catreal(ɘ, 1>))
\mvdash{} (\mdownarrow{}ratreal(ɘ, 1>) \mleq{} ratreal(x)) \mvee{} (\mdownarrow{}ratreal(x) \mleq{} ratreal(ɘ, 1>))
By
Latex:
D 1
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