Selected publications
A. Research Articles
Preprints
 Positivity of LCK
potential (in
collaboration with Misha Verbitsky).
 Embedding of
LCK manifolds with potential into Hopf manifolds using RieszSchauder
theorem (in
collaboration with Misha Verbitsky). To appear in the
proceedings of the "INdAM Meeting Complex and Symplectic Geometry"
held in Cortona 2016.
 The spectral
sequence of the canonical
foliation of a Vaisman manifold (in collaboration with Vladimir
Slesar).
 Hopf surfaces in
locally conformally Kaehler manifolds with
potential (in
collaboration with Misha Verbitsky).
 Weighted
BottChern
and Dolbeault cohomology for LCK manifolds with potential (in
collaboration with Misha Verbitsky and Victor
Vuletescu). To appear in J. Math. Soc. Japan.
 Homogeneous locally
conformally Kaehler manifolds (in collaboration with Andrei Moroianu)
arXiv:1311.0671
Published papers
 Basic MorseNovikov
cohomology for foliations (in collaboration with Vladimir
Slesar),
Mathematische Zeitschrift 284 (2016), no. 12, 469489.
 LCK rank of locally
conformally Kaehler manifolds with potential (in
collaboration with Misha Verbitsky). J.
Geom. Physics. 107 (2016), 9298.
 Locally conformally
Kaehler metrics obtained from pseudoconvex shells (in
collaboration with Misha Verbitsky)
Proceedings Amer. Math. Soc. 144 (2016), 325335.
 Compact homogeneous
LCK manifolds are Vaisman (in collaboration with Andrei Moroianu and P.
Gauduchon) Math. Annalen. 361 (2015), 10431048.
 Holomorphic submersions of
locally conformally Kaehler manifolds (in collaboration with
Maurizio Parton and
V.
Vuletescu).
Annali di Matematica Pura
ed Applicata 193(5) (2014), 13451351.
 OeljeklausToma manifolds and
locally
conformally Kahler metrics. A state of the art. (in
collaboration with V. Vuletescu).
Stud. Univ.
BabesBolyai
Math.
58(2013), No. 4, 459468.
 Spin(9) geometry of
the
octonionic Hopf fibration (in collaboration with
M. Parton, P.
Piccinni, V. Vuletescu).
Transformation groups, 18 nr. 3 (2013)
845864. DOI:
10.1007/S000310139233x.
 Blowups
of locally conformally Kaehler manifolds (in
collaboration with Misha Verbitsky and Victor
Vuletescu,
International Mathematics Research
Notices 12 (2013) 28092821. doi:10.1093/imrn/rns128.
 Locally conformally
Kaehler manifolds admitting a holomorphic conformal flow (in
collaboration with Misha Verbitsky),
Math. Zeitschrift 273 (2013), 605611. DOI
10.1007/s002090121022z.
 An integral invariant from the viewpoint
of locally conformally Kaehler geometry (in collaboration with A.
Futaki and K. Hattori), arXiv:1105.4774.
Manuscripta mathematica, 140, 112 (2013). DOI:
10.1007/s0022901105279
 Submanifolds in manifolds with
metric mixed 3structures (in collaboration with S. Ianus and G.E.
Vilcu). Mediterranean Journal of Math. 9(2012), 105128.
 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),
531545.
 Automorphisms of locally conformally
Kaehler
manifolds (in collaboration with M.
Verbitsky),
arXiv:0906.2836. International Mathematics Research
Notices vol. 2012 Nr. 4 894903
doi:10.1093/imrn/rnr053.
 OeljeklausToma manifolds admitting no
complex subvarieties (in collaboration with Misha Verbitsky), Mathematical Research
Letters 18(4),
(2011), 747754.
 A report on locally
conformally Kaehler manifolds (in collaboration with
Misha
Verbitsky), arxiv:1002.3473. "Harmonic Maps and Differential Geometry"
Contemporary
Mathematics 542, 135150, 2011.
 On holomorphic maps and
generalized complex geometry (in collaboration with
R. Pantilie).
Journal of Geometry and Physics 61 (2011) 15021515,
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),
353363.
 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),
589593.
 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), 4767.
 Locally conformal Kaehler manifolds with
potential (in collaboration with
Misha Verbitsky),
Mathematische Annalen 348 (2010), 2533.
 Topology of locally conformal
Kaehler
manifolds with potential (in collaboration with Misha Verbitsky).
International Mathematics Research
Notices, 4 (2010), 117126. MR:2011e:32021
 On the local structure of generalized Kaehler
manifolds (in collaboration with R. Pantilie),
Bull. Math. Soc. Sci. Math.
Roumanie, 52(2009), 347354. MR 2554493
 Transformations of locally conformally
Kaehler
manifolds (in collaboration with Andrei Moroianu),
Manuscripta Mathematica 130 (2009), 93100. MR 2010f:53046.
 MorseNovikov cohomology of locally
conformally Kaehler manifolds (in collaboration with Misha
Verbitsky), Journal of Geometry and Physics 59, No. 3 (2009),
295305. MR 2010h:32024.
 EinsteinWeyl
structures on complex manifolds and
conformal version of MongeAmpere equation (in collaboration with
Misha Verbitsky), Bull. Math. Soc. Sci.
Math. Roumanie
Tome 51(99) No. 4, 2008, 339353. MR 2010a:32039
 Conformally Einstein Products and Nearly Kaehler
Manifolds (in collaboration with Andrei Moroianu),
Annals of Global Analysis and Geometry 33(2008), 1118. MR 2008i:53058
 Constructions in Sasakian Geometry (in
collaboration with Charles P.
Boyer,
Krzysztof Galicki). Mathematische Zeitschrift 257 (2007),
907924. MR 2008m:53103
 Sasakian structures on CRmanifolds
(in collaboration with Misha Verbitsky),
Geometriae Dedicata, 125 (2007), 159173. MR 2008h:53071
 Embeddings
of compact Sasakian
manifolds (in collaboration with Misha Verbitsky),
Mathematical Research Letters, 14 (2007), 703710. 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), 25012522. MR 2007i:53080.
 CRsubmanifolds. A class of examples.
Revue roumaine de math. pures appl. 51 (2006) 7785. MR 2007i:53057.
 Locally conformally Kaehler manifolds.
A selection of results. Lecture Notes of
Seminario Interdisciplinare di Matematica, 4(2005), 121152. MR 2007c:53101. For an updated version see math.DG/0411503.
 Nonzero contact and Sasakian
reduction (in collaboration with O. Dr\u agulete),
Differential Geometry and its
Applications 24 (2006), 260270. MR 2007e:53111.
 Harmonicity and minimality of vector fields and
distributions on locally conformal Kaehler and hyperkaehler
manifolds (in collaboration with L. Vanhecke), Bull. of the
Belgian Math. Soc. "Simon Stevin" 12 (2005) 543555. MR 2007d:53106
 An immersion theorem for Vaisman
manifolds
(in collaboration with Misha
Verbitsky,),
Mathematische Annalen 332 (2005), 121143. MR 2006e:53112
 Locally conformal Kaehler reduction
(in collaboration with R. Gini and M. Parton,).
Crelle Journal fuer die
Reine und Angewandte Mathematik 581 (2005), 121. MR 2006c:53077
 Geometric flow on compact locally conformally
Kaehler manifolds
(in collaboration with Y.
Kamishima ).
Tohoku Math. J. 57 (2) (2005), 201221. MR 2006g:53112
 Eigenvalue estimates for the Dirac operator and
harmonic
1forms of constant length (in collaboration with A. Moroianu).
Comptes
Rendus Acad. Sci. Paris, 338 (2004), 561564. MR 2005f:58054
 Structure theorem for compact Vaisman
manifolds,
Mathematical Research Letters, 10 (2003), 799805 (in collaboration with
Misha
Verbitsky). Also available at math.DG/0305259. MR 2004j:53093)
 Potential 1forms for hyperKaehler structures
with
torsion, Classical and Quantum Gravity 20 (2003), 18451856
(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), 695714.
(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, 4380 (2001). Also on math.DG/0105041. Zbl 1029.53055
 Cayley 4frames and a quaternion Kaehler
reduction
related to Spin(7), Global differential geometry: the mathematical legacy of Alfred Gray (Bilbao 2000),
401405, 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),
38093816 (in collaboration with G. Grantcharov) MR 2002e:53060
 Local almost contact metric
3structures Publicationes Mathematicae (Debrecen)
57 (2000) 499508 (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), 925942 (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), 107121
(in collaboration with T. Bingh and L. Tamassy) MR 2000g:53074
 Locally
conformal Kaehler metrics on Hopf
surfaces, Annales de
l'Institut Fourier, 48 (1998), 11071127 (in collaboration with P.
Gauduchon) MR 2000g:53088
 Compact
hyperhermitianWeyl and
quaternion HermitianWeyl
manifolds, Annals of Global Analysis and Geometry, 16 (1998),
383398. (in collaboration with P. Piccinni). MR
99k:53097; Erratum, Same journal, 18
(2000), 105106. MR 2000k:53044.
 An example of an almost hyperbolic
Hermitian manifold, International Journal of Mathematics and
Mathematical Sciences, 21 (1998), 613618 (in collaboration with C.L.
Bejan). MR 98m:53039
 Locally conformal Kaehler structures in
quaternionic geometry,
Transactions of the American Mathematical Society, 349 (1997), 641655, (in collaboration
with P. Piccinni).
MR 97e:53091.
 Induced Hopf bundles and Einstein
metrics, in New developments in
differential geometry, Budapest (1996), 295306, 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), 261267, (in collaboration with P. Piccinni). MR
99k:53098.
 Holomorphic and harmonic maps on locally conformal Kaehler
manifolds,
Bolletino dell'Unione Matematica Italiana, (7)9A(1995), 569579, (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),
233249, (in collaboration with G. Romani). Zbl. 833:53015.
 Locally conformal Kaehler manifolds. A survey, Quaderno
n. 12,
Dip. di Mat., Univ. di Roma "La Sapienza", (1994)
 The fundamental equations of conformal
submersions, Beitraege zur
Algebra und Geometrie / Contributions to Algebra and Geometry, 34, (1993),
233243, (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), 39,
MR 95d:35066
 Immersions spheriques dans une variete de Hopf
generalisee,
Comptes Rendus de l' Acad. Sci. Paris, 316, Serie I, (1993),
6366, (in
collaboration with S. Ianus, K.
Matsumoto), MR 93m:53067
 A theorem on nonnegatively curved locally conformal Kaehler
manifolds,
Rendiconti di Matematica (Roma), serie VII, 12, (1992), 257262, MR
93h:53071
 A class of antiinvariant submanifolds of a generalized Hopf manifold,
Bull. Math. de la Soc. Sci. Math. de Roumanie, 34, (1990), 115123,
(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), 137142,
MR 92i:53019
 Complex hypersurfaces with planar geodesics in generalized Hopf
manifolds, Mathematika Balkanica 3 (1989) 9296, MR 90g:53072
 Complex hypersurfaces of a generalized Hopf manifold,
Publications de l'Inst. Math. (Beograd), 42, (1987), 123129, (in
collaboration with S. Ianus, K.
Matsumoto) MR 89f:53079
 CRsubmanifolds of a locally conformal Kaehler manifold,
Demonstratio Mathematica, 19, (1986), 863869, MR 90g:53072
B. Monographs
 Locally conformal Kaehler geometry, Progress in Mathematics 155,
Birkhauser, 1998 (in collaboration with Sorin Dragomir).
C. Textbooks
 Differentiable curves and surfaces. A problem book (in Romanian), Univ. of Bucharest Publ. House,
1995.

An introduction in
geometry
(in Romanian, in collaboration with A. Turtoi), Theta Foundation Publ.
House, 2000. 2nd edition: 2011.
 An introduction in differential geometry (in Romanian), Theta
Foundation Publ. House, 2015.