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research
On the Cox ring of blowing up the diagonal
Authors
Hendrik Bäker
Publication date
22 February 2014
Publisher
View
on
arXiv
Abstract
We compute the Cox rings of the blow-ups
B
l
Δ
(
X
′
×
X
′
)
\mathrm{Bl}_\Delta(X'\times X')
Bl
Δ
(
X
′
×
X
′
)
and
B
l
Δ
(
P
1
n
)
\mathrm{Bl}_\Delta(\mathbb P_1^n)
Bl
Δ
(
P
1
n
)
where
X
′
X'
X
′
is a product of projective spaces and
Δ
\Delta
Δ
is the (generalised) diagonal.Comment: 8 page
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Last time updated on 15/11/2016