Step
*
of Lemma
derivative-mul
∀I:Interval. ∀f1,f2:I ⟶ℝ. ∀g1,g2:{h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))} .
(d(f1[x])/dx = λx.g1[x] on I
⇒ d(f2[x])/dx = λx.g2[x] on I
⇒ d(f1[x] * f2[x])/dx = λx.(f1[x] * g2[x]) + (f2[x] * g1[x]) on I)
BY
{ (Auto THEN All (RepUR ``so_apply``) THEN BLemma `derivative-mul-part1` THEN Auto) }
1
1. I : Interval
2. f1 : I ⟶ℝ
3. f2 : I ⟶ℝ
4. g1 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
5. g2 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
6. d(f1 x)/dx = λx.g1 x on I
7. d(f2 x)/dx = λx.g2 x on I
⊢ λ2x.f1 x(x) (proper)continuous for x ∈ I
2
1. I : Interval
2. f1 : I ⟶ℝ
3. f2 : I ⟶ℝ
4. g1 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
5. g2 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
6. d(f1 x)/dx = λx.g1 x on I
7. d(f2 x)/dx = λx.g2 x on I
⊢ λ2x.f2 x(x) (proper)continuous for x ∈ I
3
1. I : Interval
2. f1 : I ⟶ℝ
3. f2 : I ⟶ℝ
4. g1 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
5. g2 : {h:I ⟶ℝ| ∀x,y:{t:ℝ| t ∈ I} . ((x = y)
⇒ ((h x) = (h y)))}
6. d(f1 x)/dx = λx.g1 x on I
7. d(f2 x)/dx = λx.g2 x on I
⊢ λ2x.g2 x(x) (proper)continuous for x ∈ I
Latex:
Latex:
\mforall{}I:Interval. \mforall{}f1,f2:I {}\mrightarrow{}\mBbbR{}. \mforall{}g1,g2:\{h:I {}\mrightarrow{}\mBbbR{}| \mforall{}x,y:\{t:\mBbbR{}| t \mmember{} I\} . ((x = y) {}\mRightarrow{} ((h x) = (h y)))\} .
(d(f1[x])/dx = \mlambda{}x.g1[x] on I
{}\mRightarrow{} d(f2[x])/dx = \mlambda{}x.g2[x] on I
{}\mRightarrow{} d(f1[x] * f2[x])/dx = \mlambda{}x.(f1[x] * g2[x]) + (f2[x] * g1[x]) on I)
By
Latex:
(Auto THEN All (RepUR ``so\_apply``) THEN BLemma `derivative-mul-part1` THEN Auto)
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