Higher rank GKZ-fans are defined for point configurations and used to construct quasi-valuations inducing flat degenerations of toric varieties to reduced unions that encode the associated polytopal subdivisions.
Ennio De Giorgi
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Higher rank Gelfand-Kapranov-Zelevinsky fans
Higher rank GKZ-fans are defined for point configurations and used to construct quasi-valuations inducing flat degenerations of toric varieties to reduced unions that encode the associated polytopal subdivisions.