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v = (v1, ..., vm) <br />

df(p)(v) = Jac f(p)(v) =<br />

⎛<br />

⎜<br />

⎝<br />

∂x1f1(p) <br />

. . . ∂xnf1(p)<br />

<br />

∂xnfm(p) . . . ∂xnfm(p)<br />

⎞ ⎛<br />

⎟ ⎜<br />

⎠ ⎝<br />

f : R n → R f Jac f(p) =<br />

(∂x1 f(p), . . . ∂xnf(p)) R n n <br />

∇f(p) grad f(p) f p<br />

f p f p<br />

Df(p)u = ∂uf(p)<br />

X = Rn Y = R p Rn R h = (h1, ..., hn) Rn <br />

h = n j=1 hjej <br />

⎛ ⎞<br />

n<br />

n<br />

n<br />

df(p)(h) = df(p) ⎝ ⎠ = df(p)(ej) · hj = ∂xjf(p) hj ∈ R.<br />

<br />

j=1<br />

hjej<br />

df(p) =<br />

j=1<br />

n<br />

j=1<br />

∂xjf(p) dxj,<br />

df (p) h = (h1, ..., hn) <br />

n<br />

∂xjf(p) hj.<br />

j=1<br />

D R n p ∈ D f : D → Y <br />

f p f p<br />

<br />

D(αf + βg) = αDf + βDg.<br />

D(f ◦ g)(p) = Df(g(p)) ◦ Dg(p) ◦ <br />

<br />

C 1 f : D → Y D R n <br />

C 1 (D, Y ) D f <br />

X, Y D ⊆ X f : D → Y <br />

u ∈ X x ∈ D ∂uf(x) ∂uf : D → Y <br />

x Y ∂uf(x) v ∈ X <br />

∂v(∂uf)(x) f D f ′ : D → L(X, Y )<br />

<br />

f ′ p f p <br />

f ′′ (p) D 2 f(p) f ′′ (p) ∈ L(X, L(X, Y )) L 2 (X ×X, Y ) <br />

L : X × X → Y <br />

<br />

K R C<br />

E a, b ∈ R f : E × [a, b] → K <br />

<br />

F (x) :=<br />

F : E → K<br />

b<br />

a<br />

f(x, t) dt<br />

j=1<br />

v1<br />

<br />

vm<br />

⎞<br />

⎟<br />

⎠ .

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