Step
*
of Lemma
continuous-add
No Annotations
∀[I:Interval]. ∀[f,g:I ⟶ℝ].
(f[x] continuous for x ∈ I
⇒ g[x] continuous for x ∈ I
⇒ f[x] + g[x] continuous for x ∈ I)
BY
{ (Auto
THEN All (Unfold `continuous`)
THEN Auto
THEN ∀h:hyp. ((InstHyp [⌜m⌝;⌜2 * n⌝] h⋅ THENA Auto) THEN Thin h THEN D -1)
THEN With ⌜rmin(d;d1)⌝ (D 0)⋅
THEN Auto
THEN Try (OnMaybeHyp 9 (\h. (FLemma `i-member-approx` [h] THEN Complete (Auto)))⋅)
THEN EAuto 1
THEN ∀h:hyp. ((InstHyp [⌜x⌝;⌜y⌝] h⋅
THENA (Auto THEN OnMaybeHyp 17 (\h. (RW (AddrC [1] (HypC h)) 0 THEN Complete (Auto)))⋅)
)
THEN Thin h
) ⋅) }
1
1. I : Interval
2. f : I ⟶ℝ
3. g : I ⟶ℝ
4. m : {m:ℕ+| icompact(i-approx(I;m))}
5. n : ℕ+
6. d : ℝ
7. r0 < d
8. d1 : ℝ
9. r0 < d1
10. r0 < rmin(d;d1)
11. x : ℝ
12. y : ℝ
13. x ∈ i-approx(I;m)
14. y ∈ i-approx(I;m)
15. |x - y| ≤ rmin(d;d1)
16. |f[x] - f[y]| ≤ (r1/r(2 * n))
17. |g[x] - g[y]| ≤ (r1/r(2 * n))
⊢ |(f[x] + g[x]) - f[y] + g[y]| ≤ (r1/r(n))
Latex:
Latex:
No Annotations
\mforall{}[I:Interval]. \mforall{}[f,g:I {}\mrightarrow{}\mBbbR{}].
(f[x] continuous for x \mmember{} I {}\mRightarrow{} g[x] continuous for x \mmember{} I {}\mRightarrow{} f[x] + g[x] continuous for x \mmember{} I)
By
Latex:
(Auto
THEN All (Unfold `continuous`)
THEN Auto
THEN \mforall{}h:hyp. ((InstHyp [\mkleeneopen{}m\mkleeneclose{};\mkleeneopen{}2 * n\mkleeneclose{}] h\mcdot{} THENA Auto) THEN Thin h THEN D -1)
THEN With \mkleeneopen{}rmin(d;d1)\mkleeneclose{} (D 0)\mcdot{}
THEN Auto
THEN Try (OnMaybeHyp 9 (\mbackslash{}h. (FLemma `i-member-approx` [h] THEN Complete (Auto)))\mcdot{})
THEN EAuto 1
THEN \mforall{}h:hyp. ((InstHyp [\mkleeneopen{}x\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{}] h\mcdot{}
THENA (Auto
THEN OnMaybeHyp 17 (\mbackslash{}h. (RW (AddrC [1] (HypC h)) 0 THEN Complete (Auto)))\mcdot{}
)
)
THEN Thin h
) \mcdot{})
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