The M-theory interpretation of certain D=10 IIA p-branes implies the existence of worldvolume Kaluza-Klein modes which are expected to appear as 0-brane/p-brane bound states preserving 1/4 of the spacetime supersymmetry. We construct the corresponding solutions of the effective supergravity theory for p = 1, 4, and show that no such solution exists for p = 8.

The main idea proposed in this paper is the perturbed shifted Chebyshev Galerkin method for the solutions of delay Fredholm and Volterra integrodifferential equations. The application of the proposed method is also extended to the solutions of integro-differential difference equations. The method is validated using some selected problems from the literature. In all the problems that are considered...

in this paper an exponentially fitted finite difference method is presented for solving singularly perturbed two-point boundary value problems with the boundary layer. a fitting factor is introduced and the model equation is discretized by a finite difference scheme on an uniform mesh. thomas algorithm is used to solve the tri-diagonal system. the stability of the algorithm is investigated. it ...

Models of Universal Extra Dimensions (UED) at the TeV scale lead to the presence of Kaluza Klein (KK) excitations of the ordinary fermions and bosons of the Standard Model that may be observed at hadron and lepton colliders. A conserved discrete symmetry, KK-parity, ensures the stability of the lightest KK particle (LKP), which, if neutral, becomes a good dark matter particle. It has been recen...

de Sitter inflationary expansion from a noncompact KK theory: a nonperturbative quantum (scalar) field formalism Abstract We develop a nonperturbative quantum scalar field formalism from a non-compact Kaluza-Klein (KK) theory using the induced-matter theory of gravity during inflation. We study the particular case of a de Sitter expansion for the universe.

We consider Kaluza Klein reductions of M-theory on the ZN orbifold of the spin bundle over S along two different U(1) isometries. The first one gives rise to the familiar “large N duality” of the N = 1 SU(N) gauge theory in which the UV is realized as the world-volume theory of N D6-branes wrapped on S, whereas the IR involves N units of RR flux through an S. The second reduction gives an equiv...

We construct a Chern-Simons type gauged N = 8 supergravity in three spacetime dimensions with gauge group SO(4) × T∞ over the infinite dimensional coset space SO(8,∞)/ (SO(8)× SO(∞)), where T∞ is an infinite dimensional translation subgroup of SO(8,∞). This theory describes the effective interactions of the (infinitely many) supermultiplets contained in the two spin-1 Kaluza-Klein towers arisin...

We discuss in detail the information on large extra dimensions which can be derived in the framework of stellar evolution theory and observation. The main effect of large extra dimensions arises from the production of the Kaluza-Klein (KK) excitations of the graviton. The KK-graviton and matter interactions are of gravitational strength, so the KK states never become thermalized and always free...

Reseña/Review (D’ Ignazio, Catherine y Klein, F. Klein), “Data Feminism”, Massachusetts, The MIT Press, ISBN: 978-0262044004, 328 págs, 2020)

Is Is a novel that attempts much and accomplishes little. The Nest is the name given to a decaying house in the country which houses three schizophrenics who have been incarcerated there for over twenty years. In their seventies, sixties and fifties, the three principal characters are Nora, who nourishes her royal delusions; Wassler, his R.A.F. world; and Hugo?the hero of the story?his versatil...