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Rational map of toric varieties from a lattice homomorphism
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Mathematics
Area of mathematics
Geometry and topology
Algebraic geometry
Toric geometry
Toric variety
2026-09-24
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A
lattice
homomorphism
always gives
a
homomorphism
of dense algebraic tori and hence
a
rational
map
of their toric compactifications. It extends across the
orbit
of
a
source
cone
exactly when that
cone
maps
into one
cone
of the target fan.
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Toric variety
Toric geometry
Algebraic geometry
Geometry and topology
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 152
/
2
/
b
/
ii
/
Solution
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