4 papers
A Classification Of Cohomogeneity One Actions On The Minkowski Space
P. Ahmadi, S. Safari, M. Hassani
The aim of this paper is to classify cohomogeneity one isometric actions on the 4-dimensional Minkowski space , up to orbit equivalence. Representations, up to co…
Cohomogeneity one conformal actions on the three-dimensional essential Riemannian spaces
Parviz Ahmadi, Masoud Hassani
The aim of this paper is to classify the cohomogeneity one conformal actions on the three-dimensional essential Riemannian spaces, up to orbit equivalence. Among other results, the…
Cohomogeneity one actions on the three-dimensional Einstein universe
Masoud Hassani, Parviz Ahmadi
The aim of this paper is to classify the cohomogeneity one conformal actions on the 3-dimensional Einstein universe , up to orbit equivalence. In a recent paper [21], w…
On the irreducible action of psl(2, r) on the 3-dimensional einstein universe
Masoud Hassani
We describe the orbits of the irreducible action of PSL(2, R) on the 3-dimensional Einstein universe Ein 1,2. This work completes the study in [2], and is one element of the classi…