Cox rings of projectivized toric vector bundles and toric flag bundles

Courtney George, Christopher Manon

Research output: Contribution to journalArticlepeer-review


Work of González, Hering, Payne, and Süß shows that it is possible to find both examples and non-examples of Mori dream spaces among projectivized toric vector bundles. This result, and the combinatorial nature of the data of projectivized toric vector bundles make them an ideal test class for the question: what makes a variety a Mori dream space? In the present paper we consider this question with respect to natural algebraic operations on toric vector bundles. Suppose E is a toric vector bundle such that the projectivization PE is a Mori dream space, then when are the direct sum toric vector bundles P(E⊕E), P(E⊕E⊕E)… also Mori dream spaces? We give an answer to this question utilizing a relationship with the associated full flag bundle FL(E). We describe several classes of examples, and we compute a presentation for the Cox ring of the full flag bundle for the tangent bundle of projective space.

Original languageEnglish
Article number107437
JournalJournal of Pure and Applied Algebra
Issue number11
StatePublished - Nov 2023

Bibliographical note

Funding Information:
The authors are supported by National Science Foundation Grant DMS-2101911 and a Simons Collaboration Grant (award number 587209 ).

Publisher Copyright:
© 2023 Elsevier B.V.

ASJC Scopus subject areas

  • Algebra and Number Theory


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