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Baily–Borel compactification
In
mathematics
, the
Baily–Borel
compactification
is a compactification of a
quotient
of a
Hermitian symmetric space
by an
arithmetic group
, introduced by .
Example
If
C
is the quotient of the
upper half plane
by a
congruence subgroup
of
SL
2
, then the Baily–Borel compactification of
C
is formed by
adding
a
finite number
of
cusps
to it.
