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## Construction of stable rank 2 bundles on P3 via symplectic bundles

Siberian Mathematical Journal. 2019. Vol. 60. No. 2. P. 343-358.
Tikhomirov A. S., Tikhomirov S., Васильев Д. А.

In this article we study the Gieseker–Maruyama moduli spaces B(e, n) of stable rank 2 algebraic vector bundles with Chern classes c1 = e ∈ {−1, 0} and c2 = n ≥ 1 on the projective space P3 . We construct the two new inﬁnite series Σ0 and Σ1 of irreducible components of the spaces B(e, n) for e = 0 and e = −1, respectively. General bundles of these components are obtained as cohomology sheaves of monads whose middle term is a rank 4 symplectic instanton bundle in case e = 0, respectively, twisted symplectic bundle in case e = −1. We show that the series Σ0 contains components for all big enough values of n (more precisely, at least for n ≥ 146). Σ0 yields the next example, after the series of instanton components, of an inﬁnite series of components of B(0, n) satisfying this property.