**Papers and preprints **

In memoriam Gilles Lachaud, La Gazette des Mathématiciens, Société Mathématique de France, Juillet 2018 - No. 157.

[0.1] Co-Editor of the proceedings "Arithmetic, Geometry and Coding Theory", Société Mathématique de France, Collection "Séminaires et congrès", no. 11, 2005.

Here is a link to the AMS-Bookstore.

[0.2] Co-Editor of a special issue of the Springer journal Cryptography and Communications - Discrete Structures, Boolean Functions and Sequences, Volume 3, Number 4 / December 2011: content and guest editorial.

[0.3] Co-Editor of the proceedings of the 2011 conference Arithmetic, Geometry, Cryptography and Coding Theory, Contemporary Mathematics - Volume 574, American Mathematical Society 2012: content.

[0.4] Co-Editor of the proceedings of the 2017 conference Arithmetic, Geometry, Cryptography and Coding Theory, Contemporary Mathematics, American Mathematical Society 2018, to appear.

[1.1]

[1.2]

[1.3] **A Weil theorem for singular curves**, joint work with
Marc Perret, Arithmetic, Geometry and Coding Theory - 1993, Walter
de Gruyter, Berlin-New York, 1-7 (1996); (pdf).

[1.4]** Coverings of singular curves over finite fields**,
joint work with Marc Perret, Manuscripta Math.88, 467-478 (1995);
(pdf).

[1.5] **Class number in totally imaginary extensions of totally
real function fields**, Proceedings of the Third International
Conference on Finite fields and Applications, Lecture Note Series
of the London Mathematical Society, Cambridge University Press,
23-29 (1996); (pdf).

[1.6] **Imaginary bicyclic biquadratic functions fields in
characteristic two**, joint work with Dominique Le Brigand, J.
Number Theory 77, 36-50 (1999); (pdf).

[1.7] **Variétés algébriques et corps de fonctions sur un corps
fini**, Habilitation à Diriger des Recherches (13/12/2002),
jury : Gerhard Frey (referee), Gerard van der Geer (referee),
Gilles Lachaud, Eric Reyssat, Philippe Satgé, Mikhaïl Tsfasman,
Serge Vladut (referee); (pdf).

[1.8] **Divisibility of zeta functions of curves in a covering**,
joint work with Marc Perret, Archiv der Mathematik 82 (2004)
205-213; (pdf).

[1.9] **On the characteristic polynomials of the Frobenius
endomorphism for projective curves over finite fields**, joint
work with Marc Perret, Finite Fields and Their Applications 10/3
(2004) 412-431; (pdf).

[1.10] **Class number in non Galois quartic and non abelian
Galois octic function fields**, Bulletin of the Greek Math.
Soc., Vol. 52, 2006 (61-76) ; (pdf).

[1.11] On the weights of binary
irreducible cyclic codes, joint work with Philippe
Langevin, "Coding and Cryptography", Springer Lecture Notes in
Computer Science, volume
3969, pp 46-54 (2006); (pdf).

[1.12] On the semiprimitivity
of cyclic codes, joint work with Philippe Langevin,
Algebraic Geometry and its Applications, World Scientific, Series
on Number Theory and its Applications, vol. 5, pp 284-293 (2008);
(pdf).

[1.13] On some questions
related to the Gauss conjecture for function fields, joint work with Régis
Blache, Journal of Number Theory 128 (2008), no. 7,
2053-2062; (pdf).

[1.14] Differentially 4-uniform
functions, joint work with François Rodier, Comtemporary
Math. 521, pp 1-8 (2010) American Mathematical Society; (pdf).

[1.15] A few more functions
that are not APN infinitely often, joint work with Gary
McGuire and François Rodier, Comtemporary Math. 518,
pp 23-31 (2010) American Mathematical Society; (pdf).

[1.17] Sur le nombre de points rationnels des variétés abéliennes et Jacobiennes sur les corps finis, joint work with Safia Haloui and Gilles Lachaud, C. R. Acad. Sci. Paris, Ser. I 350 (2012) 907–910; (pdf).

[1.18] On the number of points on abelian and Jacobian varieties over finite fields, joint work with Safia Haloui and Gilles Lachaud, Acta Arithmetica 160.3, pp 201-242 (2013); (pdf).

[1.19] On a conjecture of Helleseth, joint work with Philippe Langevin, CAI 2013, LNCS 8080, pp. 113-118, 2013, Springer-Verlag Berlin Heidelberg 2013 ; (pdf).

[1.20] Every triangle-free induced subgraph of the triangular lattice is $(5m,2m)$-choosable, joint work with Jean-Christophe Godin and Olivier Togni, Discrete Applied Mathematics 166 (2014), 51-58; pdf.

[1.21] Cyclotomie des sommes de Weil binomiales, joint work with Daniel J. Katz and Philippe Langevin, C. R. Acad. Sci. Paris, Ser. I 352 (2014) 373-376 ; pdf.

[1.22] Cyclotomy of Weil sums of binomials, joint work with Daniel J. Katz and Philippe Langevin, Journal of Number Theory 154 (2015) 160-178 ; pdf.

[1.23] On the maximum number of rational points on singular curves over finite fields, joint work with Annamaria Iezzi, Moscow Math. Journal, Volume 15, Issue 4, October-December 2015, pp. 615-627 (2015) ; website ; pdf.

[1.24] On the number of rational points on Prym varieties over finite fields, joint work with Safia Haloui, Glasgow Math. Journal, Vol 58, 55-68 (2016) ; pdf.

[1.25] Free Choosability of the cycle, joint work with Jean-Christophe Godin and Olivier Togni, Graphs and Combinatorics, May 2016, Volume 32, pp. 851-859, Springer (2016) ; website ; pdf.

[1.26] Thue equations and CM-fields, joint work with Dimitrios Poulakis, Ramanujan Journal (2017) Volume 42, Issue 1, pp 145-156 ; pdf.

[1.27] Optimal and maximal singular curves, joint work with Annamaria Iezzi, Contemporary Mathematics, Volume 686, pp 31-43, American Mathematical Society (2017) ; pdf.

[1.28]

[1.29]

[1.30]

[2.1] On the weights of irreducible cyclic codes, joint work with Philippe Langevin, Book of Abstract of the Workshop on Coding and Cryptography, Bergen (Norway), pp 161-169 (2005); (pdf)

[2.2] Extended core and
choosability of a graph, joint work with Jean-Christophe
Godin and Olivier Togni, (2010); arXiv preprint.

[3.1]

[3.2] **Une formule de nombres de classes**, Rapport de
Recherche S.D.A.D. - C.N.R.S. ESA 6081, (1998-3).

[3.3] **Principal imaginary bicyclic function fields**,
Rapport de Recherche S.D.A.D. - C.N.R.S. ESA 6081, (1998-4).

[3.4] **An analogue of an Artin conjecture for zeta function
of algebraic curves**, joint work with Marc Perret, Prétirage
de l'Institut de Mathématiques de Luminy no. 2002-25, (14 pages),
(2002).

[4.1]