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pro vyhledávání: '"Costa J.-M."'
Autor:
Pierel, J. D. R., Arendse, N., Ertl, S., Huang, X., Moustakas, L. A., Schuldt, S., Shajib, A. J., Shu, Y., Birrer, S., Bronikowski, M., Hjorth, J., Suyu, S. H., Agarwal, S., Agnello, A., Bolton, A. S., Chakrabarti, S., Cold, C., Courbin, F., Della Costa, J. M., Dhawan, S., Engesser, M., Fox, O. D., Gall, C., Gomez, S., Goobar, A., Jimenez, C., Johansson, J., Li, G., Marques-Chaves, R., Mao, S., Mazzali, P. A., Perez-Fournon, I., Petrushevska, T., Poidevin, F., Rest, A., Sheu, W., Shirley, R., Silver, E., Storfer, C., Treu, T., Wojtak, R., Zenati, Y.
Supernovae (SNe) that have been multiply-imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to develop the critical tools and methodologies needed as the sample of lensed SNe increases by orde
Externí odkaz:
http://arxiv.org/abs/2211.03772
Autor:
Antunes, P., da Costa, J. M. Nunes
The binary bracket of a Courant algebroid structure on $(E,\langle \cdot,\cdot \rangle)$ can be extended to a $n$-ary bracket on $\Gamma(E)$, yielding a multi-Courant algebroid. These $n$-ary brackets form a Poisson algebra and were defined, in an al
Externí odkaz:
http://arxiv.org/abs/2206.10231
Akademický článek
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Introducing Nijenhuis forms on Lie-infinity algebras gives a general frame to understand deformations of the latter. We give here a Nijenhuis interpretation of a deformation of an arbitrary Lie algebroid into a Lie-infinity algebra. Then we show that
Externí odkaz:
http://arxiv.org/abs/1604.08084
Autor:
Antunes, P., da Costa, J. M. Nunes
Hypersymplectic structures with torsion on Lie algebroids are investigated. We show that each hypersymplectic structure with torsion on a Lie algebroid determines three Nijenhuis morphisms. From a contravariant point of view, these structures are twi
Externí odkaz:
http://arxiv.org/abs/1501.00887
Autor:
Antunes, P., da Costa, J. M. Nunes
We introduce the notion of hypersymplectic structure on a Courant algebroid and we prove the existence of a one-to-one correspondence between hypersymplectic and hyperk\"ahler structures. This correspondence provides a simpler way to define a hyperk\
Externí odkaz:
http://arxiv.org/abs/1412.4992
We investigate Nijenhuis deformations of $L_\infty$-algebras, a notion that unifies several Nijenhuis deformations, namely those of Lie algebras, Lie algebroids, Poisson structures and Courant structures. Additional examples, linked to Lie $n$-algebr
Externí odkaz:
http://arxiv.org/abs/1308.6119
Autor:
Antunes, P., da Costa, J. M. Nunes
We define hypersymplectic structures on Lie algebroids recovering, as particular cases, all the classical results and examples of hypersymplectic structures on manifolds. We prove a 1-1 correspondence theorem between hypersymplectic structures and (p
Externí odkaz:
http://arxiv.org/abs/1304.4102
Autor:
da Costa, J. M. Nunes, Petalidou, F.
We study the characteristic foliation of a twisted Jacobi manifold. We show that a twisted Jacobi manifold is foliated into leaves that are, according to the parity of the dimension, endowed with a twisted contact or a twisted locally conformal sympl
Externí odkaz:
http://arxiv.org/abs/math/0612145
Autor:
da Costa, J. M. Nunes, Petalidou, F.
We study quasi-Jacobi and Jacobi-quasi bialgebroids and their relationships with twisted Jacobi and quasi Jacobi manifolds. We show that we can construct quasi-Lie bialgebroids from quasi-Jacobi bialgebroids, and conversely, and also that the structu
Externí odkaz:
http://arxiv.org/abs/math/0612146