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- Luis A. Cordero, Phillip E. Parker
- 2005

We find the Riemann curvature tensors of all leftinvariant Lorentzian metrics on 3-dimensional Lie groups. MSC(1991): Primary 53C50; Secondary 53B30, 53C30. âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’â†’Î¥Ì‚Â·â€¦ (More)

- Luis A. Cordero, Phillip E. Parker
- 1999

We begin a systematic study of these spaces, initially following along the lines of Eberleinâ€™s comprehensive study of the Riemannian case. In particular, we integrate the geodesic equation, discussâ€¦ (More)

- Luis A. Cordero, M. Martinez Fernandez, Luis Ugarte, Luiza Ugarte
- 2010

We classify the 6-dimensional compact nilmanifolds that admit abelian complex structures, and for any such complex structure J we describe the space of symplectic forms which are compatible with J .

- Luis A. Cordero, Phillip E. Parker
- 2005

In a previous paper, we determined the possible pointwise symmetry groups of sectional curvature considered as a rational function. We determined the naturally reductive homogeneous spaces withâ€¦ (More)

- Luis A. Cordero, Phillip E. Parker
- 2007

While still a semidirect product, the isometry group can be strictly larger than the obvious Riemannian analogue Iaut. In fact, there are three relevant groups of isometries, Ispl â‰¤ Iaut â‰¤ I, andâ€¦ (More)

- Luis A. Cordero, Phillip E. Parker
- 2008

We give a basic treatment of lattices Î“ in these groups. Certain tori TF and TB provide the model fiber and the base for a submersion of Î“\N . This submersion may not be pseudoriemannian in the usualâ€¦ (More)

- Ana ClopÃ©s, Montse Gasol, +8 authors Josep RamÃ³n GermÃ
- Journal of medical economics
- 2017

BACKGROUND
In 2011 the first payment-by-results (PbR) scheme in Catalonia was signed between the Catalan Institute of Oncology (ICO), the Catalan Health Service, and AstraZeneca (AZ) for theâ€¦ (More)

- Luis A. Cordero, Phillip E. Parker
- 2004

We begin a systematic study of these spaces, initially following along the lines of Eberleinâ€™s comprehensive study of the Riemannian case. In particular, we integrate the geodesic equation, discussâ€¦ (More)

- Luis A. Cordero, Marisa Fern, Luis Ugarte, Leandro Cordero
- 1998

Strongly non-nilpotent complex structures on compact complex nilmanifolds ?nG are deened and characterized. As an application, a compact complex nil-manifold ?nG with a non-nilpotent complexâ€¦ (More)