Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Deschamps, Guillaume"'
Autor:
Dussarrat, Pierre1 (AUTHOR) pierre.dussarrat@eumetsat.int, Deschamps, Guillaume1 (AUTHOR), Coppens, Dorothee1 (AUTHOR)
Publikováno v:
Remote Sensing. Dec2024, Vol. 16 Issue 23, p4449. 18p.
Autor:
Deschamps, Guillaume
Ce mémoire porte sur la continuité des rituels divinatoires païens dans le cadre du culte chrétien en Gaule du IVe au VIe siècle. Il comporte une introduction rapportant notre problématique, notre terminologie, notre méthodologie ainsi que nos
Externí odkaz:
http://hdl.handle.net/1866/13430
Autor:
Deschamps, Guillaume
We first make a little survey of the twistor theory for hypercomplex, generalized hypercomplex, quaternionic or generalized quaternionic manifolds. This last theory was iniated by Pantilie, who shows that any generalized almost quaternionic manifold
Externí odkaz:
http://arxiv.org/abs/1601.03882
Autor:
Dussarrat, Pierre1 (AUTHOR) pierre.dussarrat@eumetsat.int, Deschamps, Guillaume1 (AUTHOR), Theodore, Bertrand1 (AUTHOR), Coppens, Dorothee1 (AUTHOR), Standfuss, Carsten2 (AUTHOR), Tournier, Bernard2 (AUTHOR)
Publikováno v:
Remote Sensing. Jun2023, Vol. 15 Issue 11, p2873. 10p.
Autor:
Deschamps, Guillaume
Dans cette thèse, nous utilisons la théorie des espaces twistoriels afin de construire des structures complexes non standards (en un sens bien précis) sur des produits de 4-variétés réelles avec la sphère de dimension deux. Pour cela nous expl
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00011091
http://tel.archives-ouvertes.fr/docs/00/04/87/74/PDF/tel-00011091.pdf
http://tel.archives-ouvertes.fr/docs/00/04/87/74/PDF/tel-00011091.pdf
Autor:
Deschamps, Guillaume
To give an almost quaternionic structure on a 4n-manifold $M$ is equivalent to give its bundle of twistors $Z(Q)\longrightarrow M$. When $Q$ is invariant under a torsion free connection, $Z(Q) $ can be provided with an almost complex structure $ \mat
Externí odkaz:
http://arxiv.org/abs/1401.5605
Autor:
Deschamps, Guillaume
The aim of this article is to use generalized complex structures in order to extend the definition of twistor spaces given by Penrose. We will adapt the integrability result of Atiyah, Hitchin and Singer. We will deduce new correspondences betwenn di
Externí odkaz:
http://arxiv.org/abs/1209.5870
Publikováno v:
Bulletin de la soci\'et\'e math\'ematique de France, 2017, 145 (1), pp.1-27
We compute the hessian of the natural Hermitian form successively on the Calabi family of a hyperk\"ahler manifold, on the twistor space of a 4-dimensional anti-self-dual Riemannian manifold and on the twistor space of a quaternionic K\"ahler manifol
Externí odkaz:
http://arxiv.org/abs/1202.0183
Autor:
Deschamps, Guillaume
In 2002 Meersseman-Verjovsky [2] constructed a smooth, codimension-one, foliation on 5-sphere by complex surfaces with two compact leaves. The aim of this note is to improve their construction in order to give a smooth foliation on 5-sphere by comple
Externí odkaz:
http://arxiv.org/abs/1003.4439
Autor:
Deschamps, Guillaume
Let (M,g) be a Riemannian 4-manifold. The twistor space Z->M is a CP1-bundle whose total space Z admits a natural metric h. The aim of this article is to study properties of complex structures on (Z,h) which are compatible with the CP1-fibration and
Externí odkaz:
http://arxiv.org/abs/0810.1135