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Publications Influence

Symmetries of supersymmetric integrable hierarchies of KP type

- E. Nissimov, S. Pacheva
- Physics, Mathematics
- 9 February 2001

This article is devoted to the systematic study of additional (non-isospectral) symmetries of constrained (reduced) supersymmetric integrable hierarchies of KP type—the so-called SKP(R;MB,MF) models.… Expand

12 5- PDF

Virasoro symmetry of constrained KP hierarchies

- H. Aratyn, E. Nissimov, S. Pacheva
- Physics, Mathematics
- 13 February 1996

Abstract The conventional formulation of additional nonisospectral sysmmetries for the full Kadomtsev-Petviashvili (KP) integrable hierarchy is not compatible with the reduction to the important… Expand

34 3- PDF

Supersymmetric Kadomtsev-Petviashvili hierarchy: ''Ghost'' symmetry structure, reductions, and Darboux-Backlund solutions

- H. Aratyn, E. Nissimov, S. Pacheva
- Mathematics, Physics
- 15 January 1998

This paper studies Manin–Radul supersymmetric Kadomtsev–Petviashvili hierarchy (MR-SKP) in three related aspects: (i) We find an infinite set of additional (“ghost”) symmetry flows spanning the same… Expand

28 3- PDF

Stable Emergent Universe -- A Creation without Big-Bang

- E. Guendelman, R. Herrera, P. Labraña, E. Nissimov, S. Pacheva
- Physics
- 31 July 2015

Based on an earlier introduced new class of generalized gravity-matter models defined in terms of two independent non-Riemannian volume forms (alternative generally covariant integration measure… Expand

6 2- PDF

Unified dark energy and dust dark matter dual to quadratic purely kinetic K-essence

- E. Guendelman, E. Nissimov, S. Pacheva
- Physics
- 22 November 2015

We consider a modified gravity plus single scalar-field model, where the scalar Lagrangian couples symmetrically both to the standard Riemannian volume-form (spacetime integration measure density)… Expand

42 1- PDF

Emergent cosmology, inflation and dark energy

- E. Guendelman, R. Herrera, P. Labraña, E. Nissimov, S. Pacheva
- Physics
- 22 August 2014

A new class of gravity–matter models defined in terms of two independent non-Riemannian volume forms (alternative generally covariant integration measure densities) on the space–time manifold are… Expand

43 1- PDF

Bäcklund and Darboux Transformations. The Geometry of Solitons

We show that any multi-component matrix KP hierarchy is equivalent to the standard onecomponent (scalar) KP hierarchy endowed with a special infinite set of abelian additional symmetries, generated… Expand

25 1- PDF

Method of Squared Eigenfunction Potentials in Integrable Hierarchies of KP Type

- H. Aratyn, E. Nissimov, S. Pacheva
- Mathematics, Physics
- 24 January 1997

Abstract:The method of squared eigenfunction potentials (SEP) is developed systematically to describe and gain new information about the Kadomtsev–Petviashvili (KP) hierarchy and its reductions.… Expand

56 1- PDF

Construction of KP hierarchies in terms of finite number of fields and their abelianization

- H. Aratyn, E. Nissimov, S. Pacheva
- Physics
- 9 September 1993

Abstract The 2M-boson representations of the KP hierarchy are constructed in terms of M mutually independent two-boson KP representations for arbitrary number M. Our construction establishes the… Expand

21 1- PDF

Strings, p-Branes and Dp-Branes With Dynamical Tension

- E. Guendelman, A. Kaganovich, E. Nissimov, S. Pacheva
- Physics
- 30 April 2003

We discuss a new class of brane models (extending both p-brane and Dp-brane cases) where the brane tension appears as an additional dynamical degree of freedom instead of being put in by hand as an… Expand

8 1- PDF

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