*Bimeromorphic geometry of LCK manifolds*(in collaboration with Misha Verbitsky).

*Holomorphic tensors on Vaisman manifolds*(in collaboration with Misha Verbitsky).

*Do products of compact complex manifolds admit LCK metrics?*(in collaboration with Misha Verbitsky and Victor Vuletescu).

*Algebraic cones of LCK manifolds with potential*(in collaboration with Misha Verbitsky).

*A Calabi-Yau theorem on Vaisman manifolds*(in collaboration with Misha Verbitsky).

*Mall bundles and flat connections on Hopf manifolds*(in collaboration with Misha Verbitsky).

*Non-linear Hopf manifolds are locally conformally Kähler*(in collaboration with Misha Verbitsky).

*Lee classes on LCK manifolds with potential*(in collaboration with Misha Verbitsky). To appear in Tohoku Math. Journal

*Conformal foliations, Kähler twists and the Weinstein construction*(in collaboration with Paul-Andi Nagy).

*Homogeneous locally conformally Kähler manifolds*(in collaboration with Andrei Moroianu) arXiv:1311.0671

### Published papers

*Compact homogeneous locally conformally Kähler manifolds are Vaisman. A new proof*(in collaboration with Misha Verbitsky). Rivista Matematica dell'Università di Parma, Volume 13 (2022) no. 2 - Proceedings of the meeting Cohomology of Complex Manifolds and Special Structures II Levico Terme (Trento), July 5-9, 2021.

*Deformations of Vaisman manifolds*(in collaboration with Vladimir Slesar). Differential Geometry and its Applications, 85 (2022), 101940. https://doi.org/10.1016/j.difgeo.2022.101940

*Compatibility between non-Kähler structures on complex (nil)manifolds*(in collaboration with Alexandra Otiman and Miron Stanciu). Transformations groups, https://doi.org/10.1007/s00031-022-09729-5.

*Supersymmetry and Hodge theory on Sasakian and Vaisman manifolds*(in collaboration with Misha Verbitsky). Manuscripta Mathematica 170 (2023), 629-658.

*Twisted Dolbeault cohomology of nilpotent Lie algebras*(in collaboration with Misha Verbitsky). Transformation Groups, 27 (2022), 225-238

*Classification of non-Kahler surfaces and locally conformally Kahler geometry*(in collaboration with Misha Verbitsky and Victor Vuletescu). Russian Math. Surveys (Uspekhi Mat. Nauk) 76 (2021), 261-289. https://doi.org/10.1070/RMS9858

*Closed orbits of Reeb fields on Sasakian manifolds and elliptic curves on Vaisman manifolds*(in collaboration with Misha Verbitsky). Mathematische Zeitschrift 299 (2021), 1187-2296. https://doi.org/10.1007/s00209-021-02776-w

*Hopf surfaces in locally conformally Kähler manifolds with potential*(in collaboration with Misha Verbitsky). Geometriae Dedicata 207 (2020), 219-226. https://doi.org/10.1007/s10711-019-00495-5.

*A characterization of compact locally conformally hyperkähler manifolds*(in collaboration with Alexandra Otiman). Annali di Matematica Pura ed Applicata 198 (2019). 1541-1549. https://doi.org/10.1007/s10231-019-00829-w

*Flat affine subvarieties in Oeljeklaus-Toma manifolds*(in collaboration with Misha Verbitsky and Victor Vuletescu). Mathematische Zeitschrift 292 (2019). 839-847. https://doi.org/10.1007/s00209-018-2121-2

*Positivity of LCK potential*(in collaboration with Misha Verbitsky). Journal of Geometric Analysis 29 (2019), 1479-1489. https://doi.org/10.1007/s12220-018-0046-y

*Locally conformally Kähler manifolds with holomorphic Lee field*(in collaboration with Andrei Moroianu and Sergiu Moroianu) Diff. Geom. Appl., 60 (2018), 33--38.

*The spectral sequence of the canonical foliation of a Vaisman manifold*(in collaboration with Vladimir Slesar). Annals of Global Analysis and Geometry, 53 (3), (2018), 311--329.

*Weighted Bott-Chern and Dolbeault cohomology for LCK manifolds with potential*(in collaboration with Misha Verbitsky and Victor Vuletescu). J. Math. Soc. Japan 70 (2018), nr. 1, 407--420.

*Embedding of LCK manifolds with potential into Hopf manifolds using Riesz-Schauder theorem*(in collaboration with Misha Verbitsky). In "Complex and Symplectic Geometry", Springer INdAM serie, 2017, 137--148.

*Basic Morse-Novikov cohomology for foliations*(in collaboration with Vladimir Slesar), Mathematische Zeitschrift 284 (2016), no. 1-2, 469-489.

*LCK rank of locally conformally Kähler manifolds with potential*(in collaboration with Misha Verbitsky). J. Geom. Physics. 107 (2016), 92-98.

*Locally conformally Kähler metrics obtained from pseudoconvex shells*(in collaboration with Misha Verbitsky) Proceedings Amer. Math. Soc. 144 (2016), 325-335.

*Compact homogeneous LCK manifolds are Vaisman*(in collaboration with Andrei Moroianu and P. Gauduchon) Math. Annalen. 361 (2015), 1043-1048.

*Holomorphic submersions of locally conformally Kähler manifolds*(in collaboration with Maurizio Parton and V. Vuletescu). Annali di Matematica Pura ed Applicata 193(5) (2014), 1345-1351.

*Oeljeklaus-Toma manifolds and locally conformally Kahler metrics. A state of the art.*(in collaboration with V. Vuletescu). Stud. Univ. Babes-Bolyai Math. 58(2013), No. 4, 459-468.

*Spin(9) geometry of the octonionic Hopf fibration*(in collaboration with M. Parton, P. Piccinni, V. Vuletescu). Transformation groups, 18 nr. 3 (2013) 845-864. DOI: 10.1007/S00031-013-9233-x.

*Blow-ups of locally conformally Kähler manifolds*(in collaboration with Misha Verbitsky and Victor Vuletescu, International Mathematics Research Notices 12 (2013) 2809-2821. doi:10.1093/imrn/rns128.

*Locally conformally Kähler manifolds admitting a holomorphic conformal flow*(in collaboration with Misha Verbitsky), Math. Zeitschrift 273 (2013), 605-611. DOI 10.1007/s00209-012-1022-z.

*An integral invariant from the viewpoint of locally conformally Kähler geometry*(in collaboration with A. Futaki and K. Hattori), arXiv:1105.4774. Manuscripta mathematica, 140, 1-12 (2013). DOI: 10.1007/s00229-011-0527-9

*Submanifolds in manifolds with metric mixed 3-structures*(in collaboration with S. Ianus and G.E. Vilcu). Mediterranean Journal of Math. 9(2012), 105-128.

*Twistor theory for CR quaternionic manifolds and related structures*(in collaboration with S. Marchiafava and R. Pantilie, arXiv:0905.1455. Monatshefte fuer Mathematik. 167 (2012), 531-545.

*Automorphisms of locally conformally Kähler manifolds*(in collaboration with M. Verbitsky), arXiv:0906.2836. International Mathematics Research Notices vol. 2012 Nr. 4 894-903 doi:10.1093/imrn/rnr053.

*Oeljeklaus-Toma manifolds admitting no complex subvarieties*(in collaboration with Misha Verbitsky), Mathematical Research Letters 18(4), (2011), 747-754.

*A report on locally conformally Kähler manifolds*(in collaboration with Misha Verbitsky), arxiv:1002.3473. "Harmonic Maps and Differential Geometry" Contemporary Mathematics 542, 135-150, 2011.

*On holomorphic maps and generalized complex geometry*(in collaboration with R. Pantilie). Journal of Geometry and Physics 61 (2011) 1502-1515, doi: 10.1016/j.geomphys.2011.03.017.

*Remarks on the product of harmonic forms*(in collaboration with Mihaela Pilca), arXiv:1001.2129 Pacific Journal of Mathematics, 250 (2011), 353-363.

*Essential points of conformal vector fields*(in collaboration with F.A. Belgun and Andrei Moroianu), arXiv:1002.0482. Journal of Geometry and Physics 61 (2011), 589-593.

*Twistorial maps between quaternionic manifolds*(in collaboration with S. Ianus, S. Marchiafava, R. Pantilie). Annali Scuola Normale Superiore di Pisa, Cl. Sci. (5) Vol. IX (2010), 47-67.

*Locally conformal Kähler manifolds with potential*(in collaboration with Misha Verbitsky), Mathematische Annalen 348 (2010), 25-33.

*Topology of locally conformal Kähler manifolds with potential*(in collaboration with Misha Verbitsky). International Mathematics Research Notices, 4 (2010), 117-126. MR:2011e:32021

*On the local structure of generalized Kähler manifolds*(in collaboration with R. Pantilie), Bull. Math. Soc. Sci. Math. Roumanie, 52(2009), 347-354. MR 2554493

*Transformations of locally conformally Kähler manifolds*(in collaboration with Andrei Moroianu), Manuscripta Mathematica 130 (2009), 93-100. MR 2010f:53046.

*Morse-Novikov cohomology of locally conformally Kähler manifolds*(in collaboration with Misha Verbitsky), Journal of Geometry and Physics 59, No. 3 (2009), 295-305. MR 2010h:32024.

*Einstein-Weyl structures on complex manifolds and conformal version of Monge-Ampere equation*(in collaboration with Misha Verbitsky), Bull. Math. Soc. Sci. Math. Roumanie Tome 51(99) No. 4, 2008, 339-353. MR 2010a:32039

*Conformally Einstein Products and Nearly Kähler Manifolds*(in collaboration with Andrei Moroianu), Annals of Global Analysis and Geometry 33(2008), 11-18. MR 2008i:53058

*Constructions in Sasakian Geometry*(in collaboration with Charles P. Boyer, Krzysztof Galicki). Mathematische Zeitschrift 257 (2007), 907-924. MR 2008m:53103

*Sasakian structures on CR-manifolds*(in collaboration with Misha Verbitsky), Geometriae Dedicata, 125 (2007), 159-173. MR 2008h:53071

*Embeddings of compact Sasakian manifolds*(in collaboration with Misha Verbitsky), Mathematical Research Letters, 14 (2007), 703-710. MR 2008c:53038

*Reduction of Vaisman structures in complex and quaternionic geometry*(in collaboration with R. Gini, M. Parton and P. Piccinni), Journal of Geometry and Physics, 56 (2006), 2501-2522. MR 2007i:53080.

*CR-submanifolds. A class of examples.*Revue roumaine de math. pures appl. 51 (2006) 77-85. MR 2007i:53057.

*Locally conformally Kähler manifolds. A selection of results.*Lecture Notes of Seminario Interdisciplinare di Matematica, 4(2005), 121-152. MR 2007c:53101. For an updated version see math.DG/0411503.

*Non-zero contact and Sasakian reduction*(in collaboration with O. Dr\u agulete), Differential Geometry and its Applications 24 (2006), 260-270. MR 2007e:53111.

*Harmonicity and minimality of vector fields and distributions on locally conformal Kähler and hyperkähler manifolds*(in collaboration with L. Vanhecke), Bull. of the Belgian Math. Soc. "Simon Stevin" 12 (2005) 543-555. MR 2007d:53106

*An immersion theorem for Vaisman manifolds*(in collaboration with Misha Verbitsky,), Mathematische Annalen 332 (2005), 121-143. MR 2006e:53112

*Locally conformal Kähler reduction*(in collaboration with R. Gini and M. Parton,). Journal für die Reine und Angewandte Mathematik 581 (2005), 1-21. MR 2006c:53077

*Geometric flow on compact locally conformally Kähler manifolds*(in collaboration with Y. Kamishima ). Tohoku Math. J. 57 (2) (2005), 201-221. MR 2006g:53112

*Eigenvalue estimates for the Dirac operator and harmonic 1-forms of constant length*(in collaboration with A. Moroianu). Comptes Rendus Acad. Sci. Paris, 338 (2004), 561-564. MR 2005f:58054

*Structure theorem for compact Vaisman manifolds*, Mathematical Research Letters, 10 (2003), 799-805 (in collaboration with Misha Verbitsky). Also available at math.DG/0305259. MR 2004j:53093)

*Potential 1-forms for hyper-Kähler structures with torsion*, Classical and Quantum Gravity 20 (2003), 1845-1856 (in collaboration with Y.S Poon and A. Swann). MR 2004e:53070

*Cosphere bundle reduction in contact geometry*, Journal of Symplectic Geometry, 1(4) (2002), 695-714. (in collaboration with O. Dragulete and T.S. Ratiu) MR 2004m:53141.

*Weyl structures in quaternionic geometry. A state of the art.*Barletta, Elisabetta (ed.), Selected topics in geometry and mathematical physics. Vol. I. Potenza: Univ. degli Studi della Basilicata, Dipartimento di Matematica, Seminario Interdisciplinare di Matematica, 43-80 (2001). Also on math.DG/0105041. Zbl 1029.53055

*Cayley 4-frames and a quaternion Kähler reduction related to Spin(7)*, Global differential geometry: the mathematical legacy of Alfred Gray (Bilbao 2000), 401-405, Contemporary Mathematics 288, Amer. Math. Soc. Providence, RI, 2001 (in collaboration with Paolo Piccinni). MR 2003c:53072

*Reduction of Sasakian manifolds*, Journal of Mathematical Physics 48 (2001), 3809-3816 (in collaboration with G. Grantcharov) MR 2002e:53060

*Local almost contact metric 3-structures*Publicationes Mathematicae (Debrecen) 57 (2000) 499-508 (in collaboration with Paola Matzeu) MR 2002a:53057

*Complex structures on some Stiefel manifolds*, Bull. Math. Soc. Sci. Math. Roumanie (N.S.) 49 (2000) (in collaboration with Paolo Piccinni) MR 2002c:53120

*On some moment maps and induced Hopf bundles in the quaternionic projective space*, International Journal of Mathematics 11 (2000), 925-942 (in collaboration with Paolo Piccinni) MR 2002a:53061

*Intersections of Riemannian submanifolds. Variations on a theme by T. J. Frankel*, Rendiconti di Matematica (Roma), 19 (1999), 107-121 (in collaboration with T. Bingh and L. Tamassy) MR 2000g:53074

*Locally conformal Kähler metrics on Hopf surfaces*, Annales de l'Institut Fourier, 48 (1998), 1107-1127 (in collaboration with P. Gauduchon) MR 2000g:53088

*Compact hyperhermitian-Weyl and quaternion Hermitian-Weyl manifolds*, Annals of Global Analysis and Geometry, 16 (1998), 383-398. (in collaboration with P. Piccinni). MR 99k:53097;*Erratum*, Same journal, 18 (2000), 105-106. MR 2000k:53044.

*An example of an almost hyperbolic Hermitian manifold*, International Journal of Mathematics and Mathematical Sciences, 21 (1998), 613-618 (in collaboration with C.-L. Bejan). MR 98m:53039

*Locally conformal Kähler structures in quaternionic geometry*, Transactions of the American Mathematical Society, 349 (1997), 641-655, (in collaboration with P. Piccinni). MR 97e:53091.

*Induced Hopf bundles and Einstein metrics*, in New developments in differential geometry, Budapest (1996), 295-306, Kluwer (in collaboration with P. Piccinni). MR 99k:53099.

*Weyl structures on quaternionic manifolds*, Proceedings of the Meeting on Quaternionic Structures in Mathematics and Physics, Trieste 1994. SISSA, Trieste, (1996), 261-267, (in collaboration with P. Piccinni). MR 99k:53098.

*Holomorphic and harmonic maps on locally conformal Kähler manifolds*, Bolletino dell'Unione Matematica Italiana, (7)9-A(1995), 569-579, (in collaboration with S. Ianus, V. Vuletescu), MR 96i:58037

*Conformal geometry of Riemannian submanifolds. Gauss, Codazzi and Ricci equations*, Rendiconti di Matematica (Roma), 15, (1995), 233-249, (in collaboration with G. Romani). Zbl. 833:53015.

*Locally conformal Kähler manifolds. A survey*, Quaderno n. 12, Dip. di Mat., Univ. di Roma "La Sapienza", (1994)

*The fundamental equations of conformal submersions*, Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry, 34, (1993), 233-243, (in collaboration with G. Romani), MR 95a:53055

*Submanifolds with parallel second fundamental form in a generalized Hopf manifold*, Ricerche di Matematica (Napoli), XLII, (1993), 3-9, MR 95d:35066

*Immersions spheriques dans une variete de Hopf generalisee*, Comptes Rendus de l' Acad. Sci. Paris, 316, Serie I, (1993), 63-66, (in collaboration with S. Ianus, K. Matsumoto), MR 93m:53067

*A theorem on nonnegatively curved locally conformal Kähler manifolds*, Rendiconti di Matematica (Roma), serie VII, 12, (1992), 257-262, MR 93h:53071

*A class of antiinvariant submanifolds of a generalized Hopf manifold*, Bull. Math. de la Soc. Sci. Math. de Roumanie, 34, (1990), 115-123, (in collaboration with S. Ianus), MR 91m:53039

*Minimal real hypersurfaces of a generalized Hopf manifold*, Analele St. Univ. "Al. I. Cuza" Iasi, 2, (1990), 137-142, MR 92i:53019

*Complex hypersurfaces with planar geodesics in generalized Hopf manifolds*, Mathematika Balkanica 3 (1989) 92-96, MR 90g:53072

*Complex hypersurfaces of a generalized Hopf manifold*, Publications de l'Inst. Math. (Beograd), 42, (1987), 123-129, (in collaboration with S. Ianus, K. Matsumoto) MR 89f:53079

*CR-submanifolds of a locally conformal Kähler manifold*, Demonstratio Mathematica, 19, (1986), 863-869, MR 90g:53072

## B. Monographs

- Locally conformal Kähler geometry, Progress in Mathematics 155, Birkhäuser, 1998 (in collaboration with Sorin Dragomir).
- Principles of locally conformally Kähler geometry, (in collaboration with Misha Verbitsky),
https://arxiv.org/pdf/2208.07188.

## C. Textbooks

- An introduction in differential geometry (in Romanian), Theta
Foundation Publ. House, 2015.

- An introduction in
geometry
(in Romanian, in collaboration with A. Turtoi), Theta Foundation Publ.
House, 2000. 2nd edition: 2011.

- Differentiable curves and surfaces. A problem book (in Romanian), Univ. of Bucharest Publ. House,
1995.