31 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Plovdiv UniversityBG23 papers
- Agricultural University PlovdivBG5 papers
- Bulgarian Academy of SciencesBG2 papers
- Institute of Mathematics and InformaticsBG2 papers
- Sofia University "St. Kliment Ohridski"BG2 papers
- Faculty of Public HealthGB1 paper
- St. Cyril and St. Methodius University of Veliko TarnovoBG1 paper
- University of PennsylvaniaUS1 paper
25 papers
Pairs of associated Yamabe almost solitons with vertical potential on almost contact complex Riemannian manifolds
Mancho Manev
Almost contact complex Riemannian manifolds, known also as almost contact B-metric manifolds, are in principle equipped with a pair of mutually associated pseudo-Riemannian metrics…
Almost Riemann Solitons with Vertical Potential on Conformal Cosymplectic Contact Complex Riemannian Manifolds
Mancho Manev
Almost Riemann solitons are introduced and studied on an almost contact complex Riemannian manifold, i.e. an almost contact B-metric manifold, obtained from a cosymplectic manifold…
Yamabe Solitons on Conformal Almost Contact Complex Riemannian Manifolds with Vertical Torse-Forming Vector Field
Mancho Manev
A Yamabe soliton is considered on an almost contact complex Riemannian manifold (also known as an almost contact B-metric manifold) which is obtained by a contact conformal transfo…
Yamabe solitons on conformal Sasaki-like almost contact B-metric manifolds
Mancho Manev
A Yamabe soliton is defined on arbitrary almost contact B-metric manifold, which is obtained by a contact conformal transformation of the Reeb vector field, its dual contact 1-form…
Para-Ricci-like Solitons on Almost Paracontact Almost Paracomplex Riemannian Manifolds
Hristo Manev, Mancho Manev
It is introduced and studied para-Ricci-like solitons with potential Reeb vector field on almost paracontact almost paracomplex Riemannian manifolds. The special cases of para-Eins…
Pair of associated Schouten-van Kampen connections adapted to an almost paracontact almost paracomplex Riemannian structure
Hristo Manev, Mancho Manev
There are introduced and studied a pair of associated Schouten-van Kampen affine connections adapted to the paracontact distribution and an almost paracontact almost paracomplex Ri…
Para-Sasaki-like Riemannian manifolds and new Einstein metrics
Stefan Ivanov, Hristo Manev, Mancho Manev
We extract a new class of paracontact paracomplex Riemannian manifolds arising from certain cone construction, call it para-Sasaki-like Riemannian manifold and give explicit exampl…
Almost Ricci-like solitons with torse-forming vertical potential of constant length on almost contact B-metric manifolds
Mancho Manev
A generalization of Ricci-like solitons with torse-forming potential, which is a constant multiple of the Reeb vector field, is studied. The conditions under which these solitons a…
Ricci-like solitons with vertical potential on Sasaki-like almost contact B-metric manifolds
Mancho Manev
Ricci-like solitons on Sasaki-like almost contact B-metric manifolds are the object of study. Cases, where the potential of the Ricci-like soliton is the Reeb vector field or point…
Ricci-like solitons on almost contact B-metric manifolds
Mancho Manev
Ricci-like solitons with potential Reeb vector field are introduced and studied on almost contact B-metric manifolds. The cases of Sasaki-like manifolds and torse-forming potential…
Lie groups as 3-dimensional almost paracontact almost paracomplex Riemannian manifolds
Mancho Manev, Veselina Tavkova
Almost paracontact almost paracomplex Riemannian manifolds of the lowest dimension 3 are considered. Such structures are constructed on a family of Lie groups and the obtained mani…
Invariant tensors under the twin interchange of the pairs of the associated metrics on almost paracomplex pseudo-Riemannian manifolds
Mancho Manev
The object of study is almost paracomplex pseudo-Riemannian manifolds with a pair of metrics associated each other by the almost paracomplex structure. A torsion-free connection an…
Two types of Lie Groups as 4-dimensional Riemannian manifolds with circulant structure
Iva Dokuzova, Dimitar Razpopov, Mancho Manev
A 4-dimensional Riemannian manifold equipped with an endomorphism of the tangent bundle, whose fourth power is the identity, is considered. The matrix of this structure in some bas…
Design, analysis and implementation of electronic test for knowledge evaluation in the course of Information Technologies for pharmaceutical students
Hristo Manev, Mancho Manev
The increased usage of the information technologies in everyday life and especially in education leads to demands for new forms of teaching, studying and appropriate examination an…
Slant null curves on normal almost contact B-metric 3-manifolds with parallel Reeb vector field
Galia Nakova, Hristo Manev
In this paper we study slant null curves with respect to the original parameter on 3-dimensional normal almost contact B-metric manifolds with parallel Reeb vector field. We prove…
A general semilocal convergence theorem for simultaneous methods for polynomial zeros and its applications to Ehrlich's and Dochev-Byrnev's methods
Petko D. Proinov
In this paper, we establish a general semilocal convergence theorem (with computationally verifiable initial conditions and error estimates) for iterative methods for simultaneous…
Associated Nijenhuis Tensors on Manifolds with Almost Hypercomplex Structures and Metrics of Hermitian-Norden Type
Mancho Manev
An associated Nijenhuis tensor of endomorphisms in the tangent bundle is introduced. Special attention is paid to such tensors for an almost hypercomplex structure and the metric o…
On a family of Weierstrass-type root-finding methods with accelerated convergence
Petko D. Proinov, Maria T. Vasileva
Kyurkchiev and Andreev (1985) constructed an infinite sequence of Weierstrass-type iterative methods for approximating all zeros of a polynomial simultaneously. The first member of…
Pair of associated Schouten-van Kampen connections adapted to an almost contact B-metric structure
Mancho Manev
There are introduced and studied a pair of associated Schouten-van Kampen affine connections adapted to the contact distribution and an almost contact B-metric structure generated…
Space-like and time-like hyperspheres in real pseudo-Riemannian 4-spaces with almost contact B-metric structures
Hristo Manev
There are considered 4-dimensional pseudo-Riemannian spaces with inner products of signature (3,1) and (2,2). The objects of investigation are space-like and time-like hyperspheres…
General convergence theorems for iterative processes and applications to the Weierstrass root-finding method
Petko D. Proinov
In this paper, we prove some general convergence theorems for the Picard iteration in cone metric spaces over a solid vector space. As an application, we provide a detailed converg…
Lie groups as 3-dimensional almost contact B-metric manifolds
Hristo Manev, Dimitar Mekerov
The object of investigations are almost contact B-metric structures on 3-dimensional Lie groups considered as smooth manifolds. There are established the existence and some geometr…
On the structure tensors of almost contact B-metric manifolds
Hristo Manev
The space of the structure (0,3)-tensors of the covariant derivatives of the structure endomorphism and the metric on almost contact B-metric manifolds is considered. A known decom…
Sasaki-like almost contact complex Riemannian manifolds
Stefan Ivanov, Hristo Manev, Mancho Manev
A Sasaki-like almost contact complex Riemannian manifold is defined as an almost contact complex Riemannian manifold which complex cone is a holomorphic complex Riemannian manifold…