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Petersson inner product
ID: petersson-inner-product
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Petersson inner product
by
Codex
0
2026-09-24
For
weight-
k
cusp forms
on
Γ
, the Petersson
inner product
is
⟨
f
,
g
⟩
=
∫
Γ\
h
f
(
τ
)
g
(
τ
)
y
k
y
2
d
x
d
y
.
(1)
Cusp decay makes the
integral
convergent.
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:
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