Skip to main content
Log in

Ovoidal fibrations in \({\pmb {PG}}\varvec{(3,q)}, {\pmb {q}}\) even

  • Published:
Proceedings - Mathematical Sciences Aims and scope Submit manuscript

Abstract

Given a partition of a projective 3-space of odd cardinality by a set of ovoids, a line secant to one of the ovoids of the partition, and its polar relative to the symplectic polarity on the projective 3-space defined by this ovoid, are tangent to distinct ovoids of the partition (Theorem 2). The proof uses the fact that the radical of the linear code generated by the duals of the hyperbolic quadrics in a symplectic generalized quadrangle is of codimension one (Theorem 4).

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Bagchi B and Sastry N S N, Even order inversive planes, generalized quadrangles and codes, Geom. Dedicata 22 (1987) 137–147

    Article  MathSciNet  Google Scholar 

  2. Bagchi B and Sastry N S N, One-step completely orthogonalizable codes from generalized quadrangles, Inform. and Comput. 77 (1988) 123–130

    Article  MathSciNet  Google Scholar 

  3. Bagchi B and Sastry N S N, Ovoidal packings of \(P(3,q)\) for even \(q\), Discrete Math. 313 (2013) 2213–2217; Corrigendum, Discrete Math. 341 (2018) 1194

  4. Barlotti A, Un’estensione del teorema di Segre-Kustaanheimo, Boll. Un. Mat. ltal. 10 (1955) 498–506

    MathSciNet  Google Scholar 

  5. Butler D K, On the intersection of ovoids sharing a polarity, Geom. Dedicata 135 (2008) 157–165

    Article  MathSciNet  Google Scholar 

  6. Cossidente A and Storme L, Caps on elliptic quadrics, Finite Fields Appl. 1 (1995) 412–420

    Article  MathSciNet  Google Scholar 

  7. Cossidente A and Vereecke S K J, Some geometry of the isomorphism \(Sp(4,q)\cong O(5,q)\), \(q\) even, J. Geom. 70 (2001) 28–37

  8. Curtis C W and Reiner I, Methods of representation theory, Vol I (1981) (New York: Wiley-Interscience Pub.)

    Google Scholar 

  9. Ebert G L, Partitioning projective geometries into caps, Canad. J. Math. XXXVII (6) (1985) 1163–1175

  10. Enomoto H, The characters of the finite symplectic group \( Sp(4,q)\), \(q = 2^{f}\), Osaka J. Math. 9 (1972) 75–94

  11. Feit W, The representation theory of finite groups (1982) (Amsterdam: North-Holland Publishing Company)

  12. Flesner D E, The geometry of subgroups of \(PSp_4(2^n)\), Illinois J. Math. 19 (1975) 48-70

    Article  MathSciNet  Google Scholar 

  13. Glynn D G, On the set of lines of \(PG(3,q)\) corresponding to a maximal cap contained in the Klein quadric of \(PG(5,q)\), Geom. Dedicata 26 (1988) 273–280

  14. Hestenes M D, Singer Groups, Can. J. Math. XXII(3) (1970) 492–513

  15. Hirschfeld J W P, Projective spaces of three dimensions (1985) (Oxford: Clarendon Press)

  16. Huppert B, Endliche Gruppen I (1967) (Berlin: Springer-Verlag)

  17. Lang S, Algebra, Second Edition (1984) (New York: Addison-Wessley)

    Google Scholar 

  18. O’Keefe C M, Ovoids in \(PG(3,q)\), a survey, Discrete Math. 151 (1996) 175–188

  19. Panella G, Caratterizzazione delle quadriche di uno spazio (tridimensionale) lineare sopra un corpo finito. Boll. Un. Mat. Ital. 10 (1955) 507-513

    MathSciNet  Google Scholar 

  20. Payne S E and Thas J A, Finite generalized quadrangles, Research Notes in Mathematics, vol. 110 (1984) (Boston/London/Melbourne: Pitman Advanced Publishing Program)

    Google Scholar 

  21. Sastry N S N and Shukla R P, Structure of a code related to \(Sp(4,q)\), \(q\) even, Proc. Indian Acad. Sci.(Math. Sci.) 117(4) (2007) 457-470

    Article  MathSciNet  Google Scholar 

  22. Segre B, Introduction to Galois Geometries, Mem. Acad. Naz. Lincei 8 (1967) 133-236

    MathSciNet  Google Scholar 

  23. Steinberg R, Representations of Algebraic groups, Nagoya J. Math. 22 (1963) 33-56

    Article  MathSciNet  Google Scholar 

  24. Steinberg R, Lectures on Chevalley Groups, Mimeographed Notes (1968) (New Haven, Conn.: Yale Univ. Math. Dept.)

  25. Tits J, Ovoides et groupes de Suzuki, Arch. Math. 13 (1962) 187-198

    Article  MathSciNet  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to R P Shukla.

Additional information

Communicating Editor: Manoj K Yadav

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Sastry, N.S.N., Shukla, R.P. Ovoidal fibrations in \({\pmb {PG}}\varvec{(3,q)}, {\pmb {q}}\) even. Proc Math Sci 130, 65 (2020). https://doi.org/10.1007/s12044-020-00594-4

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s12044-020-00594-4

Keywords

Mathematics Subject Classification

Navigation