Schwarz-Christoffel Formula for Multiply Connected Domains
Schwarz-Christoffel Formula for Multiply Connected Domains
Schwarz-Christoffel Formula for Multiply Connected Domains
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12 (2012), No. 2 <strong>Schwarz</strong>-<strong>Christoffel</strong> <strong>Formula</strong> <strong>for</strong> <strong>Multiply</strong> <strong>Connected</strong> <strong>Domains</strong> 459<br />
∑<br />
and summation of the results obtained (including 1 n<br />
2 m=1<br />
term) yields<br />
(32)<br />
ϕ k (z) = c k + 1 2<br />
<strong>for</strong> |z − a k | ≤ r k .<br />
n∑ ∑M m<br />
m=1 l=1<br />
∑ Mm<br />
l=1<br />
(<br />
β lm ln z lm − z<br />
z lm − w + ∑ ln z lm − z(k ∗ 1 )<br />
z<br />
k 1 ≠k lm − w(k ∗ 1 )<br />
+ ∑ k 1 ≠k<br />
+ ∑ k 1 ≠k<br />
∑<br />
ln z lm − z(k ∗ 2 k 1 )<br />
z lm − w ∗ k 2 ≠k 1<br />
(k 2 k 1 )<br />
∑<br />
k 2 ≠k 1<br />
∑<br />
ln z lm − z(k ∗ 3 k 2 k 1 )<br />
z<br />
k 3 ≠k lm − w ∗ 2 (k 3 k 2 k 1 )<br />
<strong>for</strong> the second<br />
)<br />
+ · · ·<br />
− ∑ (1 − iξ k1 ) ln a k 1<br />
− z<br />
a k1 − w − ∑ ∑<br />
(1 − iξ k2 ) ln a k 2<br />
− z(k ∗ 1 )<br />
a<br />
k 1 ≠k<br />
k 1 ≠k k 2 ≠k k2 − w ∗ 1 (k 1 )<br />
− ∑ ∑ ∑<br />
(1 − iξ k3 ) ln a k 3<br />
− z(k ∗ 2 k 1 )<br />
a k3 − w ∗ k 1 ≠k k 3 ≠k 2<br />
(k 2 k 1 )<br />
− ∑ k 1 ≠k<br />
k 2 ≠k 1<br />
∑<br />
∑<br />
k 2 ≠k 1 k 3 ≠k 2<br />
∑<br />
k 4 ≠k 3<br />
(1 − iξ k4 ) ln a k 4<br />
− z ∗ (k 3 k 2 k 1 )<br />
a k4 − w ∗ (k 3 k 2 k 1 )<br />
+ · · · ,<br />
6. Construction of f ′ (z)<br />
Substitute equation (32) <strong>for</strong> ϕ k in (25) and write the result <strong>for</strong> the function<br />
F (z; ξ 1 , ξ 2 , . . . , ξ n ) = exp(Ω(z)) in the <strong>for</strong>m of the infinite product<br />
{ ⎡<br />
n∏ ∏M m ( ) ( )<br />
βlm /2<br />
zlm − z<br />
n∏<br />
⎤ zlm − z ∗ βlm /2<br />
(k)<br />
(33) F (z; ξ 1 , ξ 2 , . . . , ξ n ) =<br />
⎣<br />
⎦<br />
z<br />
m=1<br />
lm − w<br />
z<br />
l=1<br />
k=1 lm − w(k)<br />
∗<br />
⎡ ( )<br />
n∏<br />
⎤ ∏ zlm − z ∗ βlm /2 }<br />
(k<br />
× ⎣<br />
1 k)<br />
⎦ · · ·<br />
z lm − w ∗ k=1 k 1 ≠k<br />
(k 1 k)<br />
[<br />
∏ n ( ) ] ⎡ ( ) ⎤<br />
1−iξk<br />
ak − w<br />
n∏ ∏ ak1 − w ∗ 1−iξk1<br />
(k)<br />
×<br />
⎣<br />
⎦<br />
a k − z<br />
a<br />
k=1<br />
k=1 k 1 ≠k k1 − z(k)<br />
∗<br />
⎡<br />
( ) ⎤<br />
n∏ ∏ ∏ ak2 − w ∗ 1−iξk2<br />
(k<br />
× ⎣<br />
1 k)<br />
⎦ · · · .<br />
a k2 − z ∗ k=1 k 1 ≠k k 2 ≠k 1<br />
(k 1 k)<br />
This product converges uni<strong>for</strong>mly in every compact subset of D\{∞}.