Клевчихин - Матан II семестр
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dx |
dy |
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0, 0 |
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x |
y |
x |
y |
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z 0, 0 |
0, z x, x |
2x4 |
0, |
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z x, x |
2x4 |
4x2 2x2 x2 |
2 |
0 |
x. |
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0, 0 |
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0 |
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1, 1 |
1, 1 |
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z x, y |
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d2z 1, 1 |
d2z 1, 1 |
10 dx 2 |
4 dx dy 10 dy 2. |
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dx
dy
0, 0
2 10 |
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2 λ |
10 λ |
0 |
10 λ 2 4 0 λ2 20λ 96 0 |
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10 |
2 |
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10 |
2 |
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λ1,2 |
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2 |
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10 |
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2 |
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z 1, 1 |
z 1, |
1 |
2 |
R2 |
F x, y |
x; y |
: F x, y C |
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F |
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y |
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f x |
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a; b |
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F x, y |
0 |
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x |
a; b |
F |
x, f x |
0. |
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x2 |
y2 |
1 |
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x2 |
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y2 |
1 |
0 |
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y |
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y2 1 x2 |
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y |
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1 x2, |
1 x 1, |
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x2 |
y2 1 |
0 |
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1 x2, |
1 x 0 |
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1 x2, x |
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f x |
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g |
x |
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1 x2, 0 x 1 |
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1 x2, x |
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F x, y |
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x0, y0 |
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Fx x, y |
Fy |
x, y |
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F x0, y0 |
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0 |
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Fy |
x0, y0 |
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x0, y0 |
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Π |
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x, y : x0 |
a x x0 |
a, y0 |
b y y0 |
b , |
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F x, y |
0 |
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y |
f x |
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x0 a; x0 a |
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f x0 |
y0 |
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f |
x |
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Fx |
x,f x |
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Fy |
x,f x |
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F x, y |
0 |
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Fy x0, y0 |
0 |
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Fy |
x, y |
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Π1 |
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x, y : x0 |
a1 |
x x0 |
a1, y0 |
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b y y0 |
b , |
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F x, y |
0 |
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F x, y 0 |
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Fy x, y |
0 |
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F x, y y |
0 |
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x, y |
Π1 |
Fy |
x, y |
0. |
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ϕ y |
F x0, y |
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y0 |
b; y0 |
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b |
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ϕ |
y |
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Fy x0, y |
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0 |
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ϕ y0 |
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F x0, y0 |
0 |
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ϕ y0 |
b |
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F x0, y0 |
b |
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0 |
ϕ y0 |
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b |
F x0, y0 |
b |
0 |
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F |
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x0, y0 |
b |
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x0, y0 |
b |
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a 0; a1 |
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x x0 |
a; x0 a |
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F x, y0 |
b |
0, F x, y0 |
b |
0. |
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Π |
x, y : x0 |
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a x x0 a; y0 |
b y y0 |
b |
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F x, y |
0 |
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x |
x0 |
a; x0 |
a |
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F x , y0 |
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b |
0 |
F x , y0 |
b |
0 |
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y |
F x , y |
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y |
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F x , y |
0 |
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y |
F x , y |
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Fy x , y |
0 |
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x |
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y |
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f |
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f x0 |
y0 |
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f |
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α 0 |
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Fy x, y |
α |
0, |
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Fy |
x, y |
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α |
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α |
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Fy x, y |
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0 |
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Fx x, y |
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M |
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x, y |
Π |
Fx x, y |
M : |
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x |
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x |
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x0 |
a; x0 |
a |
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y f x |
x |
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f x |
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y f x |
y |
y f x |
x |
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F x1, . . . , xN , y |
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x01, . . . , x0N , y0 |
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F |
k |
x1, . . . , xN , y F |
y |
x1, . . . , xN , y |
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F x01, . . . , x0N , y0 |
x |
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0 |
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Fy x01, . . . , x0N , y0 |
0 |
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x01, . . . , x0N , y0 |
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Π |
x1, . . . , xN , y : x0k ak xk |
x0k ak , k 1, . . . , N, y0 b y y0 b , |
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F x1, . . . , xN , y |
0 |
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yf x1, . . . , xN
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Πx |
0 |
x1, . . . , xN |
: xk |
ak xk xk |
ak, k 1, . . . , N . |
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f x01, . . . , x0N |
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y0 |
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f |
x |
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Fxk |
x1,...,xN ,f x1,...xN |
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xk |
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F |
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N |
1 |
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x |
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y |
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x1, . . . , xN , y |
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x, y |
x |
x1, . . . , xN |
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x0, y0 |
x01, . . . , x0N , y0 |
a |
a1, . . . , aN |
x0 a |
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x01 a1, . . . , x0N aN |
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x0 |
a x x0 |
a |
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k x0k |
ak |
xk |
x0 |
ak , |
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xx1, . . . , xN
N |
a1, . . . , aN |
x0 |
a |
a 0 |
k ak 0
F x, y
x0, y0
Fxk x, y Fy x, y k 1, . . . , N
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Π |
x, y : x0 |
a x x0 |
a; y0 |
b y y0 |
b |
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F x, y |
0 |
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x x0 |
a; x0 |
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F x , y0 |
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F x , y0 |
b |
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y |
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F x , y |
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y |
F x , y |
0 |
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y |
F x , y |
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Fy x , y |
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f x0 |
y0 |
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α 0 |
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Fy x, y |
α |
0, |
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Fy x, y |
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α |
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α |
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Fy x, y |
0 |
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Fxk |
x, y |
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M x, y Π |
Fxk x, y M : |
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x |
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x1, . . . , xN |
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x x |
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x0 |
a; x0 |
a |
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y f x |
x |
f x |
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y f x |
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y |
y |
f x |
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f |
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F x, y |
0 |
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F x |
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x, y |
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y 0. |
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F x |
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x, y |
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y |
F x, y |
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N |
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F |
k x θ x, y θ y xk |
F |
y |
x θ x, y θ y y, |
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k 1 |
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xk |
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k0 |
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F |
k0 |
x |
θ |
x, y |
θ |
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xk0 |
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x θ |
x, y |
θ |
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y |
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ln |
x2 y2 |
arctg y |
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y |
2x arctg y |
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x |
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x |
y |
z ex |
y |
z |
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dz d2z |
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z |
x |
arctg |
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z |
x |
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d2z F |
z |
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0 |
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x |
z |
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F x, y |
x0, y0 |
x |
x |
x0 δ, x0 δ |
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D |
RN |
RM |
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F |
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x1, . . . , xN |
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D RN |
y1, . . . , yM RM |
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F |
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F |
y1 |
F 1 x1, . . . , xN , |
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x1, . . . , xN |
y1, . . . , yM |
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yM |
F M x1, . . . , xN , |
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F |
M |
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M |
N |
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D |
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RM |
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RN |
RM |
N M 2
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A1, . . . , AM |
RM |
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F |
x x0 |
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ε |
0 |
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δ |
0 |
x |
0 |
x |
x0 |
δ |
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F x |
ε |
lim F x |
ε |
0 |
δ |
0 x : 0 |
x |
x0 δ |
F x |
ε. |
x x0 |
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Uε |
U δ x0 : x U δ x0 F x Uε x0 |
ε 0 δ |
0 |
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x1, . . . , xN : 0 |
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x |
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x1 x1 2 |
xN xN 2 |
δ |
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0 |
0 |
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F 1 x1, . . . , xN |
A1 2 |
F M x1, . . . , xN |
AM 2 |
ε. |
A1, . . . , A
RM |
F : D RN |
RM |
x x0 |
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k 1, . . . , N |
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lim |
F k x1, . . . , xN |
Ak |
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x1 x01 |
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xN xN0
ε 0 |
δ 0 |
0 |
x x0 |
δ |
F 1 x1, . . . , xN A1 2 |
F M x1, . . . , xN AM 2 |
ε. |