20.06.2013 Views

pdf (it, 2.898,97 KB, 25/01/13)

pdf (it, 2.898,97 KB, 25/01/13)

pdf (it, 2.898,97 KB, 25/01/13)

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Jac ϕ(θ, y) =<br />

⎛<br />

⎜<br />

⎝<br />

− y 2 + a 2 sin θ<br />

y cos θ<br />

√ y 2 +a 2<br />

<br />

0 1<br />

y2 + a2 cos θ<br />

√y sin θ<br />

y2 +a2 <br />

<br />

ω2 = det 2 B1 + det 2 B2 + det 2 B3<br />

<br />

B1 =<br />

− y 2 + a 2 sin θ<br />

⎛<br />

y cos θ<br />

√ y 2 +a 2<br />

0 1<br />

B2 = ⎝ −y2 + a2 sin θ<br />

<br />

y2 + a2 cos θ<br />

B3 =<br />

<br />

<br />

0 1<br />

y2 + a2 cos θ<br />

√y cos θ<br />

y2 +a2 √y sin θ<br />

y2 +a2 √y sin θ<br />

y2 +a2 <br />

<br />

⎞<br />

⎞<br />

⎟<br />

⎠ .<br />

, det 2 B1 = (y 2 + a 2 ) sin 2 θ.<br />

⎠ , det 2 B2 = y 2 ,<br />

, det 2 B3 = (y 2 + a 2 ) cos 2 θ.<br />

ω2 = 2y2 + a2 a = 0 ω2 = √ 2|y| <br />

S0 <br />

2π 1<br />

dσ =<br />

1 √ √<br />

1<br />

ω2dθ dy = 2π 2|y| dy = 4π 2 y dy = 2π<br />

0 −1<br />

−1<br />

0<br />

√ 2.<br />

Sa<br />

ϕ <br />

(a, 0, 0) = ϕ(0, 0) (0, a, 0) (0, 0, a) <br />

(±1, 0, 0) <br />

<br />

⎛<br />

det ⎝<br />

±1 0 0<br />

0 0 a<br />

0 a 0<br />

⎞<br />

= ⎠ = ∓a 2 .<br />

(a, 0, 0) (−1, 0, 0)<br />

<br />

Φ(Sa, ⎛<br />

2π F1 ◦ ϕ −<br />

1 ⎜<br />

F ) = det ⎜<br />

⎝<br />

0 −1<br />

y2 + a2 y cos θ<br />

sin θ √<br />

y2 +a2 F2 ◦ ϕ 0 1<br />

F3 ◦ ϕ y2 + a2 ⎞<br />

⎟<br />

⎠ dy dθ<br />

y sin θ<br />

cos θ √<br />

y2 +a2 ⎛<br />

2π (y<br />

1 ⎜<br />

= det ⎜<br />

⎝<br />

0 −1<br />

2 + a2 ) cos2 θ − y2 + a2 ⎞<br />

y cos θ<br />

sin θ √<br />

y2 +a2 ⎟<br />

<br />

y/2 0 1 ⎟<br />

⎠ dy dθ<br />

y2 + 1 cos θ y2 + a2 y sin θ<br />

cos θ √<br />

y2 +a2 ⎛<br />

2π 1<br />

= (−y/2)det ⎝<br />

0 −1<br />

−y2 + a2 ⎞<br />

y cos θ<br />

sin θ √<br />

y2 +a2 ⎠<br />

y2 + a2 y sin θ dy dθ+<br />

cos θ √<br />

y2 +a2 2π 1 <br />

(y2 + a2 ) cos2 θ − y2 + a2 + (−1)det <br />

sin θ<br />

dy dθ<br />

0 −1<br />

y2 + 1 cos θ y2 + a2 cos θ<br />

2π 1<br />

= y 2 1 2π <br />

/2 dy dθ + (y 2 + a 2 ) 3/2 cos 3 θ + (y 2 + a 2 <br />

) sin θ cos θ dθ dy<br />

0<br />

−1<br />

−1<br />

0

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!