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Mori Flips, Cluster Algebras and Diptych Varieties Without Unprojection

Published online by Cambridge University Press:  25 October 2022

Hamid Abban
Affiliation:
Loughborough University
Gavin Brown
Affiliation:
University of Warwick
Alexander Kasprzyk
Affiliation:
University of Nottingham
Shigefumi Mori
Affiliation:
Kyoto University, Japan
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Summary

We give a survey on the connections between terminal 3-fold flips and cluster algebras. In particular we observe that Mori’s algorithm for generating the relations defining a type k2A flipping neighbourhood is a form of generalised cluster algebra mutation. We then use the Laurent phenomenon for this cluster algebra structure to give an alternative proof of the existence of Brown and Reid’s diptych varieties.

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Recent Developments in Algebraic Geometry
To Miles Reid for his 70th Birthday
, pp. 116 - 149
Publisher: Cambridge University Press
Print publication year: 2022

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References

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