Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter April 7, 2021

Vector bundles 𝐸 on ℙ3 with homological dimension 2 and 𝜒(End 𝐸) = 1

  • Sérgio Mendes ORCID logo , Rosa María Miró-Roig ORCID logo and Helena Soares ORCID logo EMAIL logo
From the journal Forum Mathematicum

Abstract

We find the complete integer solutions of the equation X2+Y2+Z2-4XY-4YZ+10XZ=1. As an application, we prove that, for each solution (a,b,c) such that a>0, b-2a>0 and (b-2a)24a, there is a vector bundle 𝐸 on P3 defined by a minimal linear resolution 0OP3(-2)aOP3(-1)bOP3cE0. In particular, 𝐸 satisfies χ(EndE)=1.

MSC 2010: 14J10; 14J30; 11D09; 14J60; 11D79

Award Identifier / Grant number: UIDB/00212/2020

Award Identifier / Grant number: UIDB/04674/2020

Award Identifier / Grant number: MTM2016-78623-P

Funding statement: Sérgio Mendes was partially supported by FCT through CMA-UBI (project UIDB/00212/2020). Rosa M. Miró-Roig was partially supported by MTM2016-78623-P. Helena Soares was partially supported by CIMA – Centro de Investigação em Matemática e Aplicações, Universidade de Évora, project UIDB/04674/2020 (Fundação para a Ciência e Tecnologia), and MTM2016-78623-P.

  1. Communicated by: Jan Bruinier

References

[1] E. Ballico, G. Bolondi, P. Ellia and R. M. Mirò-Roig, Curves of maximum genus in range A and stick-figures, Trans. Amer. Math. Soc. 349 (1997), no. 11, 4589–4608. 10.1090/S0002-9947-97-01917-XSearch in Google Scholar

[2] G. Bohnhorst and H. Spindler, The stability of certain vector bundles on Pn, Complex Algebraic Varieties (Bayreuth 1990), Lecture Notes in Math. 1507, Springer, Berlin (1992), 39–50. 10.1007/BFb0094509Search in Google Scholar

[3] M. C. Brambilla, Cokernel bundles and Fibonacci bundles, Math. Nachr. 281 (2008), no. 4, 499–516. 10.1002/mana.200510620Search in Google Scholar

[4] J. W. S. Cassels, Rational Quadratic Forms, Dover, New York, 1978. Search in Google Scholar

[5] I. Dolgachev and M. Kapranov, Arrangements of hyperplanes and vector bundles on Pn, Duke Math. J. 71 (1993), no. 3, 633–664. 10.1215/S0012-7094-93-07125-6Search in Google Scholar

[6] D. Eisenbud and S. Goto, Linear free resolutions and minimal multiplicity, J. Algebra 88 (1984), no. 1, 89–133. 10.1016/0021-8693(84)90092-9Search in Google Scholar

[7] R. Hartshorne and R. M. Miró-Roig, On the intersection of ACM curves in P3, J. Pure Appl. Algebra 219 (2015), no. 8, 3195–3213. 10.1016/j.jpaa.2014.10.009Search in Google Scholar

[8] K. Ireland and M. Rosen, A Classical Introduction to Modern Number Theory, Springer, New York, 1990. 10.1007/978-1-4757-2103-4Search in Google Scholar

[9] M. Jardim and R. V. Martins, Linear and Steiner bundles on projective varieties, Comm. Algebra 38 (2010), no. 6, 2249–2270. 10.1080/00927871003757584Search in Google Scholar

[10] S. Marchesi and D. M. Prata, Simplicity and exceptionality of syzygy bundles over Pn, Ann. Mat. Pura Appl. (4) 195 (2016), no. 1, 41–58. 10.1007/s10231-014-0451-1Search in Google Scholar

[11] R. M. Miró-Roig and H. Soares, Exceptional bundles of homological dimension 𝑘, Forum Math. 29 (2017), no. 3, 701–715. 10.1515/forum-2015-0058Search in Google Scholar

[12] J.-P. Serre, Cours d’arithmétique, Coll. SUP Le Math. 2, Presses Universitaires de France, Paris, 1970. Search in Google Scholar

[13] H. Soares, Steiner Vector Bundles on Algebraic Varieties, Ph.D. thesis, University of Barcelona, 2008. Search in Google Scholar

[14] A. Weil, Number Theory: An Approach Through History, Birkhäuser, Boston, 1984. Search in Google Scholar

Received: 2020-06-25
Published Online: 2021-04-07
Published in Print: 2021-05-01

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Downloaded on 14.5.2024 from https://www.degruyter.com/document/doi/10.1515/forum-2020-0169/html
Scroll to top button