Cet article est une Introduction à la Programmation Linéaire avec le Solveur de Microsoft® Excel™. Une firme fabrique plusieurs types produits avec des prix de ventes constants et des contraintes techniques et commerciales données. Le travail à fair [...]
In this work, we develop an a posteriori error analysis of a conforming mixed finite element method for solving the coupled problem arising in the interaction between a free fluid and a fluid in a poroelastic medium on isotropic meshes in R d , d ∈ [...]
We prove that a compact Lorentzian manifold (M, g) admitting a causal Killing vector field is totally vicious or it contains a compact achronal Killing horizon. In particular a compact spacetime which satisfies the null generic condition and admits [...]
We study normalized null hypersurfaces in Brinkmann spacetimes with special attention paid to Plane Fronted Waves. We explore geodesibil- ity criterion and characterization for null hypersurfaces in links with relative position of a global paralle [...]
ATINDOGBE COMLAN CYRIAQUE [1], KEMADJOU THEOPHILE MBIAKOP [1],
In the present paper various necessary and/or sufficient conditions in terms of the existence and properties of quasi-time functions, semi-time functions and generalized time functions are provided to get different levels of the causal ladder in spac [...]
KPANZOU A. TCHILABALA [1], GAMADO M. KOKOUVI [2], HOUNNON HIPPOLYTE [3],
ATTAN SYLVAIN [1], HOUNNON HIPPOLYTE [2], KPAMEGAN ASSOGBA BERNARDIN [3],