The Michigan Mathematical Journal

Splitting Criteria for Vector Bundles Induced by Restrictions to Divisors

Mihai Halic

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In this article we obtain criteria for the splitting and triviality of vector bundles by restricting them to partially ample divisors. This allows us to study the problem of splitting on the total space of fibre bundles. The statements are illustrated with examples.

For products of minuscule homogeneous varieties, we show that the splitting of vector bundles can be tested by restricting them to subproducts of Schubert 2-planes. By using known cohomological criteria for multiprojective spaces, we deduce necessary and sufficient conditions for the splitting of vector bundles on products of minuscule varieties.

The triviality criteria are particularly suited to Frobenius split varieties. We prove that a vector bundle on a smooth toric variety, whose anticanonical bundle has stable base locus of codimension at least three, is trivial precisely when its restrictions to the invariant divisors are trivial, with trivializations compatible along the various intersections.

Article information

Michigan Math. J., Volume 67, Issue 2 (2018), 227-251.

Received: 19 July 2016
Revised: 18 January 2018
First available in Project Euclid: 24 March 2018

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Zentralblatt MATH identifier

Primary: 14C20: Divisors, linear systems, invertible sheaves 14F17: Vanishing theorems [See also 32L20] 14M17: Homogeneous spaces and generalizations [See also 32M10, 53C30, 57T15] 14M25: Toric varieties, Newton polyhedra [See also 52B20]


Halic, Mihai. Splitting Criteria for Vector Bundles Induced by Restrictions to Divisors. Michigan Math. J. 67 (2018), no. 2, 227--251. doi:10.1307/mmj/1521856929.

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