Zobrazeno 1 - 10
of 76
pro vyhledávání: '"NANNICINI, Antonella"'
Autor:
Blaga, Adara M., Nannicini, Antonella
We introduce the concept of generalized almost plastic structure, and, on a pseudo-Riemannian manifold endowed with two $(1,1)$-tensor fields satisfying some compatibility conditions, we construct a family of generalized almost plastic structures and
Externí odkaz:
http://arxiv.org/abs/2411.13074
Autor:
Blaga, Adara M., Nannicini, Antonella
We put into light some generalized almost quaternionic and almost para-quaternionic structures and characterize their integrability with respect to a $\nabla$-bracket on the generalized tangent bundle $TM\oplus T^*M$ of a smooth manifold $M$, defined
Externí odkaz:
http://arxiv.org/abs/2302.05239
Autor:
Blaga, Adara M., Nannicini, Antonella
We show that statistical and semi-Weyl structures with torsion are invariant under conformal-projective transformations. We prove that a non-degenerate submanifold of a semi-Weyl (respectively, statistical) manifold with torsion is also a semi-Weyl (
Externí odkaz:
http://arxiv.org/abs/2209.00689
We study the Kodaira dimension of a real parallelizable manifold $M$, with an almost complex structure $J$ in standard form with respect to a given parallelism. For $X = (M, J)$ we give conditions under which $\operatorname{kod}(X) = 0$. We provide e
Externí odkaz:
http://arxiv.org/abs/2207.04458
Autor:
BLAGA, Adara M.1 adarablaga@yahoo.com, NANNICINI, Antonella2 antonella.nannicini@unifi.it
Publikováno v:
Turkish Journal of Mathematics. 2024, Vol. 48 Issue 3, p448-468. 22p.
The aim of this paper is to continue the study of Kodaira dimension for almost complex manifolds, focusing on the case of compact $4$-dimensional solvmanifolds without any integrable almost complex structure. According to the classification theory we
Externí odkaz:
http://arxiv.org/abs/2008.10881
Autor:
Blaga, Adara M., Nannicini, Antonella
Publikováno v:
Journal of Geometry and Physics, vol. 165, 2021, (1-17)
We consider a family of $\alpha$-connections defined by a pair of generalized dual quasi-statistical connections $(\hat{\nabla},\hat{\nabla}^*)$ on the generalized tangent bundle $(TM\oplus T^*M, \check{h})$ and determine their curvature, Ricci curva
Externí odkaz:
http://arxiv.org/abs/2004.05036
The notion of Kodaira dimension has recently been extended to general almost complex manifolds. In this paper we focus on the Kodaira dimension of almost K\"ahler manifolds, providing an explicit computation for a family of almost K\"ahler threefolds
Externí odkaz:
http://arxiv.org/abs/1908.11328
Autor:
Blaga, Adara M., Nannicini, Antonella
Publikováno v:
Rendiconti del Seminario Matematico Universit\`a e Politecnico di Torino, vol. 79, no. 1, 2021, (43-58)
The concept of harmonic metallic structure on a metallic pseudo-Riemannian manifold is introduced. In the case of compact manifolds we prove that harmonicity of a metallic structure $J$, with $J^2=pJ+qI$ and $p^2+4q\neq 0$, is equivalent to $dJ=0$. C
Externí odkaz:
http://arxiv.org/abs/1908.08832
Autor:
Blaga, Adara M., Nannicini, Antonella
We give necessary and sufficient conditions for the real distributions defined by a metallic pseudo-Riemannian structure to be integrable and geodesically invariant, in terms of associated tensor fields to the metallic structures and of adapted conne
Externí odkaz:
http://arxiv.org/abs/1903.04006