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Past exam of the mathematics course of the University of Cambridge
/
2025
/
iii
/
Paper 306
/
2
/
a
/
Solution
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Past exam of the mathematics course of the University of Cambridge
2025
iii
Paper 306
2
a
Created
2026-09-24
Updated
2026-09-25
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The
Green function
for the normalization in the question is
⟨
X
(
z
,
z
ˉ
)
X
(
w
,
w
ˉ
)⟩
=
−
2
1
lo
g
∣
z
−
w
∣
2
+
e
x
t
co
n
s
t
an
t
.
(1)
Differentiating at distinct points gives the holomorphic two-point
function
⟨
∂
z
X
(
z
)
∂
w
X
(
w
)⟩
=
−
2
(
z
−
w
)
2
1
.
(2)
Ancestors
(11)
a
2
Paper 306
iii
2025
Past exam of the mathematics course of the University of Cambridge
Mathematics course of the University of Cambridge
Course of the University of Cambridge
University of Cambridge
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