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A note on projective and flat dimensions and the Bieri-Neumann-Strebel-Renz Sigma-invariants
(Taylor & Francis IncPhiladelphiaEUA, 2007)
Flat tori, lattices and bounds for commutative group codes
(SPRINGER, 2008)
We show that commutative group spherical codes in R(n), as introduced by D. Slepian, are directly related to flat tori and quotients of lattices. As consequence of this view, we derive new results on the geometry of these ...
On the Maxwell supergravity and flat limit in 2 + 1 dimensions.
The construction of the three-dimensional Chern–Simons supergravity theory invariant under the minimal Maxwell superalgebra is presented. We obtain a supergravity action without cosmological constant term characterized by ...
Quaternion Kahler flat manifolds
(Elsevier Science, 2001-02)
It is the main purpose of this lecture to indicate a rather general method to construct quaternion-Kahler compact flat manifolds. This construction will give many families of quaternion Kahler manifolds of dimensions 8 or ...
On the supersymmetry invariance of flat supergravity with boundary.
The supersymmetry invariance of flat supergravity (i.e., supergravity in the absence of any internal scale in the Lagrangian) in four dimensions on a manifold with non-trivial boundary is explored. Using a geometric approach ...