S. Ivanov

发表

Vanishing theorems on (l|k)-strong Kaehler manifolds with torsion

S. Ivanov, G. Papadopoulos, 2012, 1202.6470.

Vanishing theorems on (ℓ|k)-strong Kähler manifolds with torsion

S. Ivanov, G. Papadopoulos, 2013 .

M ay 2 00 8 NEARLY HYPO STRUCTURES ANDCOMPACT NEARLY KÄHLER 6-MANIFOLDS WITH CONICAL SINGULARITIES

L. Ugarte, S. Ivanov, V. Muñoz, 2020 .

Nearly hypo structures and compact nearly Kähler 6‐manifolds with conical singularities

L. Ugarte, S. Ivanov, Marisa Fern'andez, 2006, math/0602160.

Compact supersymmetric solutions of the heterotic equations of motion in dimensions 7 and 8

L. Ugarte, S. Ivanov, Marisa Fernández, 2011 .

Compact supersymmetric solutions of the heterotic equations of motion in dimension 5

L. Ugarte, S. Ivanov, Marisa Fernández, 2008, 0806.4356.

Bianchi type A hyper-symplectic metrics, gravitational instantons and their duality

L. Ugarte, S. Ivanov, J. Santisteban, 2011 .

A no-go theorem for string warped compactifications

S. Ivanov, G. Papadopoulos, 2000, hep-th/0008232.

D G ] 9 J an 2 00 3 Weyl structures with positive Ricci tensor

S. Ivanov, B. Alexandrov, 2003 .

Killing spinor equations in dimension 7 and geometry of integrable G2-manifolds

S. Ivanov, T. Friedrich, 2001, math/0112201.

Extremals for the Sobolev inequality on the seven-dimensional quaternionic Heisenberg group and the quaternionic contact Yamabe problem

S. Ivanov, D. Vassilev, I. Minchev, 2007, math/0703044.

Para-Sasaki-like Riemannian manifolds and new Einstein metrics

S. Ivanov, H. Manev, M. Manev, 2020, Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas.

Connections with torsion, parallel spinors and geometry of Spin(7) manifolds

S. Ivanov, 2001, math/0111216.

Vanishing theorems and string backgrounds

S. Ivanov, G. Papadopoulos, Stefan Ivanov, 2000, math/0010038.

Quaternionic Heisenberg Group and Heterotic String Solutions with Non-Constant Dilaton in Dimensions 7 and 5

L. Ugarte, S. Ivanov, D. Vassilev, 2015, Communications in Mathematical Physics.

Heterotic supersymmetry, anomaly cancellation and equations of motion

S. Ivanov, 2009, 0908.2927.

SU(3)-Instantons and G2,Spin(7)-Heterotic String Solitons

S. Ivanov, Petar N. Ivanov, 2003, math/0312094.

On the Geometry of Closed G2-Structures

S. Ivanov, R. Cleyton, 2003, math/0306362.

Parallel spinors and connections with skew-symmetric torsion in string theory

S. Ivanov, T. Friedrich, 2001, math/0102142.

Conformal equivalence between certain geometries in dimension 6 and 7

S. Ivanov, R. Cleyton, 2006, math/0607487.

Hyper-parahermitian manifolds with torsion

S. Ivanov, V. Tsanov, Simeon Zamkovoy, 2004, math/0405585.

Analytic fields on compact balanced Hermitian manifolds

S. Ivanov, G. Ganchev, 1996, dg-ga/9606011.

Quaternionic contact hypersurfaces in hyper-Kähler manifolds

S. Ivanov, D. Vassilev, I. Minchev, 2016, Annali di Matematica Pura ed Applicata (1923 -).

Quaternionic Kähler and Spin(7) metrics arising from quaternionic contact Einstein structures

L. Ugarte, S. Ivanov, J. Santisteban, 2012, Annali di Matematica Pura ed Applicata.

Almost contact manifolds, connections with torsion and parallel spinors

S. Ivanov, T. Friedrich, 2001, math/0111131.

Non-Kaehler Heterotic String Compactifications with Non-Zero Fluxes and Constant Dilaton

L. Ugarte, S. Ivanov, R. Villacampa, 2008, 0804.1648.

Quaternionic Contact Einstein Structures and the Quaternionic Contact Yamabe Problem

S. Ivanov, D. Vassilev, I. Minchev, 2006, math/0611658.

Quaternionic K\"ahler and hyperK\"ahler manifolds with torsion and twistor spaces

S. Ivanov, I. Minchev, 2001, math/0112157.

The quaternionic Heisenberg group and Heterotic String Solutions with non-constant dilaton in dimensions 7 and 5

L. Ugarte, S. Ivanov, D. Vassilev, 2014, 1410.4130.

O ct 2 00 0 CERN-TH / 2000-282 Vanishing Theorems and String Backgrounds

S. Ivanov, G. Papadopoulos, St Kl, 2000 .

ParaHermitian and paraquaternionic manifolds

Stefan Ivanov, S. Ivanov, Simeon Zamkovoy, 2005 .

Sasaki-like almost contact complex Riemannian manifolds

S. Ivanov, H. Manev, M. Manev, 2014, 1402.5426.

Non-Kaehler heterotic string solutions with non-zero fluxes and non-constant dilaton

L. Ugarte, S. Ivanov, D. Vassilev, 2014, 1402.6107.

The Lichnerowicz and Obata first eigenvalue theorems and the Obata uniqueness result in the Yamabe problem on CR and quaternionic contact manifolds

S. Ivanov, D. Vassilev, 2015, 1504.03259.

Curvature decomposition of G2-manifolds

S. Ivanov, R. Cleyton, 2007, math/0702289.

Non-symmetric Riemannian gravity and Sasaki–Einstein 5-manifolds

S. Ivanov, M. Zlatanovic, 2019, Classical and Quantum Gravity.

On the Strominger System and Holomorphic Deformations

L. Ugarte, S. Ivanov, 2018, The Journal of Geometric Analysis.

On the Strominger System and Holomorphic Deformations

L. Ugarte, S. Ivanov, 2017, 1705.02792.

Orthogonal complex structures on certain Riemannian 6-manifolds ∗

S. Ivanov, G. Grantcharov, V. Apostolov, 1999 .

Hermitian Structures on Twistor Spaces

S. Ivanov, G. Grantcharov, V. Apostolov, 1998 .

SU(3)-structures on submanifolds of a Spin(7)-manifold

S. Ivanov, F. M. Cabrera, 2005, math/0510406.

Locally conformal parallel $G_2$ and $Spin(7)$ manifolds

S. Ivanov, M. Parton, P. Piccinni, 2005, math/0509038.

Nearly hypo structures and compact nearly Kähler 6‐manifolds with conical singularities

L. Ugarte, S. Ivanov, Marisa Fern'andez, 2006, math/0602160.

Deformations of generalized calibrations and compact non-Kähler manifolds with vanishing first Chern class

S. Ivanov, J. Gutowski, G. Papadopoulos, 2002, math/0205012.

Vanishing theorems on Hermitian manifolds

S. Ivanov, B. Alexandrov, 1999, math/9901090.

Formality of 7-dimensional 3-Sasakian manifolds

S. Ivanov, Marisa Fern'andez, V. Muñoz, 2015, ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE.

Weyl structures with positive Ricci tensor

S. Ivanov, B. Alexandrov, 1999, math/9902033.

HKT manifolds with holonomy SL(n,H)

S. Ivanov, A. Petkov, 2010, 1010.5052.

Geometry of quaternionic Kähler connections with torsion

S. Ivanov, 2000, math/0003214.

Einstein-Hermitian surfaces and Hermitian Einstein-Weyl structures in dimension 4

P. Gauduchon, S. Ivanov, 1997 .

The CR almost Schur Lemma and the positivity conditions

S. Ivanov, A. Petkov, 2022, ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE.

AN OBATA-TYPE THEOREM ON A THREE-DIMENSIONAL CR MANIFOLD

S. Ivanov, D. Vassilev, 2012, Glasgow Mathematical Journal.

Curvature properties of twistor spaces of quaternionic Kähler manifolds

S. Ivanov, G. Grantcharov, B. Alexandrov, 1998 .

Compact Hermitian surfaces of constant antiholomorphic sectional curvatures

S. Ivanov, V. Apostolov, G. Ganchev, 1997 .

Riemannian Manifold in Which the Skew-Symmetric Curvature Operator has Pointwise Constant Eigenvalues

Stefan Ivanov, S. Ivanov, Irina Petrova, 1998 .

Dirac Operators on Hermitian Spin Surfaces

S. Ivanov, B. Alexandrov, 2000 .

The Dolbeault operator on Hermitian spin surfaces

S. Ivanov, G. Grantcharov, B. Alexandrov, 1999, math/9902005.

An estimate for the first eigenvalue of the Dirac operator on compact Riemannian spin manifold admitting parallel one-form

S. Ivanov, G. Grantcharov, B. Alexandrov, 1998 .

Solution of the qc Yamabe equation on a 3-Sasakian manifold and the quaternionic Heisenberg group

S. Ivanov, D. Vassilev, I. Minchev, 2015, Analysis & PDE.

The optimal constant in the $L^2$ Folland-Stein inequality on the quaternionic Heisenberg group

S. Ivanov, D. Vassilev, I. Minchev, 2010, 1009.2978.

Twistor and reflector spaces of almost para-quaternionic manifolds

S. Ivanov, I. Minchev, Simeon Zamkovoy, 2005, math/0511657.

The geodesics and isoparametric functions on a Randers sphere ∗

R. Bryant, S. Ivanov, Qun He, 2021 .

Extremals for the Sobolev Inequality and the Quaternionic Contact Yamabe Problem

Stefan Ivanov, S. Ivanov, Dimiter Vassilev, 2011 .

The Obata sphere theorems on a quaternionic contact manifold of dimension bigger than seven

S. Ivanov, D. Vassilev, A. Petkov, 2013, 1303.0409.

Connections on a non-symmetric (generalized) Riemannian manifold and gravity

S. Ivanov, M. Zlatanovic, 2015, 1503.05217.

An Obata type result for the first eigenvalue of the sub-Laplacian on a CR manifold with a divergence-free torsion

S. Ivanov, D. Vassilev, 2012, Journal of Geometry.

An Obata type result for the first eigenvalue of the sub-Laplacian on a CR manifold with a divergence-free torsion

S. Ivanov, D. Vassilev, 2012, 1203.5812.

The Sharp Lower Bound of the First Eigenvalue of the Sub-Laplacian on a Quaternionic Contact Manifold

S. Ivanov, D. Vassilev, A. Petkov, 2011, The Journal of Geometric Analysis.

The almost Schur Lemma in quaternionic contact geometry

S. Ivanov, A. Petkov, 2022, Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas.

A Bonnet–Myers type theorem for quaternionic contact structures

S. Ivanov, D. Barilari, 2019, Calculus of Variations and Partial Differential Equations.

A Bonnet–Myers type theorem for quaternionic contact structures

S. Ivanov, D. Barilari, 2017, Calculus of Variations and Partial Differential Equations.

The qc Yamabe problem on non-spherical quaternionic contact manifolds

S. Ivanov, A. Petkov, 2016, Journal de Mathématiques Pures et Appliquées.

A heat equation on a quaternionic contact manifold

S. Ivanov, A. Petkov, 2016, 1608.00460.

Non-umbilical quaternionic contact hypersurfaces in hyper-K\"ahler manifolds

S. Ivanov, D. Vassilev, I. Minchev, 2014, 1609.02838.

Quaternionic contact Einstein manifolds

S. Ivanov, D. Vassilev, I. Minchev, 2013, 1306.0474.

The Sharp Lower Bound of the First Eigenvalue of the Sub-Laplacian on a Quaternionic Contact Manifold

S. Ivanov, D. Vassilev, A. Petkov, 2011 .

THE TWISTOR SPACE OF A QUATERNIONIC CONTACT MANIFOLD

S. Ivanov, J. Davidov, I. Minchev, 2010, 1010.4994.

Quaternionic Kähler and Spin(7) metrics arising from quaternionic contact Einstein structures

L. Ugarte, S. Ivanov, J. Santisteban, 2010, 1009.2745.

Explicit Quaternionic Contact Structures and Metrics with Special Holonomy

L. Ugarte, S. Ivanov, J. Santisteban, 2009, 0903.1398.

Quaternionic contact manifolds with a closed fundamental 4‐form

S. Ivanov, D. Vassilev, 2008, 0810.3888.

Conformal quaternionic contact curvature and the local sphere theorem

S. Ivanov, D. Vassilev, 2007, 0707.1289.

D G ] 4 F eb 1 99 9 Weyl structures with positive Ricci tensor

S. Ivanov, B. Alexandrov, 1999 .

THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS GEOMETRY OF QUATERNIONIC KAHLER CONNECTIONS WITH TORSION

S. Ivanov, 2005 .

0 M ar 2 00 0 Geometry of Quaternionic Kähler connections with torsion

S. Ivanov, 2000 .

Einstein-Weyl structures on compact conformal manifolds

S. Ivanov, 1999 .

Harmonic spinors of the Dirac operator of connection with torsion in dimension four

S. Ivanov, Peter Dalakov, 2001 .

Quaternionic contact hypersurfaces in hyper-Kähler manifolds

S. Ivanov, D. Vassilev, I. Minchev, 2014 .

The Riemannian curvature identities of a $G_2$ connection with skew-symmetric torsion and generalized Ricci solitons

S. Ivanov, N. Stanchev, 2023, 2307.05619.

The Riemannian curvature identities of a G 2 connection with totally skew-symmetric torsion

S. Ivanov, N. Stanchev, 2023 .

The Riemannian Bianchi identities of metric connections with skew torsion and generalized Ricci solitons

S. Ivanov, N. Stanchev, 2023, 2307.03986.

13th International Conference on Geometry and Applications

S. Ivanov, A. Kreuzer, H. Karzel, 2018, Journal of Geometry.

The Riemannian curvature identities on Almost Complex Calabi-Yau with torsion 6-manifold and generalized Ricci solitons

S. Ivanov, N. Stanchev, 2023, 2307.05001.

The Riemannian curvature identities on Almost Complex Calabi-Yau manifolds with torsion

S. Ivanov, N. Stanchev, 2023 .

A sub-Riemannian Bonnet-Myers theorem for quaternionic contact structures

S. Ivanov, D. Barilari, 2017 .

Conformal paracontact curvature and the local flatness theorem

S. Ivanov, D. Vassilev, Simeon Zamkovoy, 2007, 0707.3773.

Harmonic and holomorphic 1-forms on compact balanced Hermitian manifolds

S. Ivanov, G. Ganchev, 2001 .

Quaternionic Heisenberg Group and Heterotic String Solutions with Non-Constant Dilaton in Dimensions 7 and 5

L. Ugarte, S. Ivanov, D. Vassilev, 2015, Communications in Mathematical Physics.

D G ] 9 J an 2 00 3 Vanishing theorems on Hermitian manifolds

S. Ivanov, B. Alexandrov, 2003 .

D G ] 2 F eb 1 99 9 Vanishing theorems on Hermitian manifolds

S. Ivanov, B. Alexandrov, 1999 .

D G ] 2 1 Ja n 19 99 Vanishing theorems on Hermitian manifolds

S. Ivanov, B. Alexandrov, 1999 .

On dual-projectively flat affine connections

S. Ivanov, 1995 .