The Dirac equation in four time and four space dimensions (or (4+ 4)-dimensions) is
considered. Step by step, we show that such an equation admits Majorana and Weyl …

A black-hole solution in four time and four space dimensions ((4+ 4)-dimensions) is
developed. It is emphasized that such a solution establishes a duality relation between the …

We develop a type of Kaluza–Klein formalism in (4+ 4)-dimensions. In the framework of this
formalism, we obtain a new kind of Schwarzschild metric solution that, via Kruskal …

We develop a cosmological model in a physical background scenario of four time and four
space dimensions ((4+ 4)-dimensions or (4+ 4)-universe). We show that in this framework …

We develop an alternative Ashtekar formalism in eight dimensions. In fact, using a
MacDowell–Mansouri physical framework and a self-dual curvature symmetry, we propose …

This chapter aims to summarize the most relevant aspects of anticoagulants. Initially, a brief
review of the physiology is given in order to understand at which step of coagulation each …