Mihai, Adela; Rosca, Radu On a class of Einstein space-time manifolds. (English) Zbl 1083.53024 Publ. Math. Debr. 67, No. 3-4, 471-480 (2005). MSC: 53B30 53C15 53C25 PDFBibTeX XMLCite \textit{A. Mihai} and \textit{R. Rosca}, Publ. Math. Debr. 67, No. 3--4, 471--480 (2005; Zbl 1083.53024)
Reyes, E.; Rosca, R. On biconcircular gradient vector fields. (English) Zbl 1010.53029 Rend. Semin. Mat. Messina, Ser. II 21, No. 6, 13-25 (1999). Reviewer: Weihuan Chen (Beijing) MSC: 53C15 53C25 53C55 PDFBibTeX XMLCite \textit{E. Reyes} and \textit{R. Rosca}, Rend. Semin. Mat. Messina, Ser. II 6, No. 21, 13--25 (1999; Zbl 1010.53029)
Buchner, Klaus; Rosca, Radu Space-time manifold carrying two space-like skew symmetric Killing vector fields. (English) Zbl 0989.53044 Rend. Semin. Mat. Messina, Ser. II 20, No. 5, 53-63 (1998). MSC: 53C50 53C15 53D15 PDFBibTeX XMLCite \textit{K. Buchner} and \textit{R. Rosca}, Rend. Semin. Mat. Messina, Ser. II 5, No. 20, 53--63 (1998; Zbl 0989.53044)
Etayo, Fernando; Rosca, Radu; Santamaría, Rafael On closed concircular almost contact Riemannian manifolds. (English) Zbl 0916.53018 Balkan J. Geom. Appl. 3, No. 2, 75-88 (1998). Reviewer: I.Mihai (Bucureşti) MSC: 53C15 53C55 53B20 PDFBibTeX XMLCite \textit{F. Etayo} et al., Balkan J. Geom. Appl. 3, No. 2, 75--88 (1998; Zbl 0916.53018) Full Text: EuDML EMIS
Calapso, M. T.; Matsumoto, K.; Mihai, I.; Roşca, R. Framed \((2m+3)\)-dimensional Riemann manifolds endowed with a Sasakian almost \(3-\)contact structure manifolds endowed with a Sasakian almost \(3-\)contact structure. (English. English summary) Zbl 0956.53035 Bull. Math. Soc. Sci. Math. Roum., Nouv. Sér. 40, No. 1, 97-106 (1997). Reviewer: V. Oproiu (Iaşi) MSC: 53C25 53C15 53C10 53C12 58D15 PDFBibTeX XMLCite \textit{M. T. Calapso} et al., Bull. Math. Soc. Sci. Math. Roum., Nouv. Sér. 40, No. 1, 97--106 (1997; Zbl 0956.53035)
Mihai, I.; Rosca, R. On manifolds endowed with a \({\mathcal T}\)-Killing almost contact 2-structure. (English) Zbl 0897.53025 Libertas Math. 17, 101-110 (1997). Reviewer: Domingo Chinea (La Laguna) MSC: 53C15 53C12 PDFBibTeX XMLCite \textit{I. Mihai} and \textit{R. Rosca}, Libertas Math. 17, 101--110 (1997; Zbl 0897.53025)
Etayo, F.; Rosca, R. On Riemannian manifolds endowed with a \(\tau\)-parallel almost contact 4-structure. (English) Zbl 0881.53019 Publ. Math. Debr. 50, No. 1-2, 57-68 (1997). Reviewer: Z.Kovács (Nyíregyháza) MSC: 53C15 53B20 53C55 PDFBibTeX XMLCite \textit{F. Etayo} and \textit{R. Rosca}, Publ. Math. Debr. 50, No. 1--2, 57--68 (1997; Zbl 0881.53019)
Mihai, I.; Nicolescu, L.; Rosca, R. On para-Kählerian manifolds \(M(J,g)\) and on skew symmetric Killing vector fields carried by \(M\). (English) Zbl 0880.53029 Port. Math. 54, No. 2, 215-228 (1997). Reviewer: V.Cruceanu (Iaşi) MSC: 53C15 53B30 PDFBibTeX XMLCite \textit{I. Mihai} et al., Port. Math. 54, No. 2, 215--228 (1997; Zbl 0880.53029) Full Text: EuDML
Etayo, Fernando; Rosca, Radu Framed \((2m+3)\)-dimensional Riemannian manifolds endowed with a Kenmotsu almost contact 3-structure. (English) Zbl 0859.53018 Libertas Math. 16, 91-103 (1996). Reviewer: A.Bucki (Oklahoma City) MSC: 53C15 53B20 53C55 PDFBibTeX XMLCite \textit{F. Etayo} and \textit{R. Rosca}, Libertas Math. 16, 91--103 (1996; Zbl 0859.53018)
Mihai, I.; Verstraelen, L.; Rosca, R. On a class of exact locally conformal cosymplectic manifolds. (English) Zbl 0847.53018 Int. J. Math. Math. Sci. 19, No. 2, 267-278 (1996). Reviewer: Z.Olszak (Wrocław) MSC: 53C15 58A15 53C20 PDFBibTeX XMLCite \textit{I. Mihai} et al., Int. J. Math. Math. Sci. 19, No. 2, 267--278 (1996; Zbl 0847.53018) Full Text: DOI EuDML
Mihai, Ion; Rosca, Radu; Verstraelen, Leopold Some aspects of the differential geometry of vector fields. On skew symmetric Killing and conformal vector fields, and their relations to various geometrical structures. (English) Zbl 0960.53019 Centre for Pure and Applied Differential Geometry (PADGE). 2. Leuven: Katholieke Univ. Leuven, Department of Mathematics, Brussel: Katholieke Univ. Brussel, Group of Exact Sciences, iv, 153 p. (1996). Reviewer: Cornelia-Livia Bejan (Iaşi) MSC: 53C15 53C25 53C55 53D10 PDFBibTeX XMLCite \textit{I. Mihai} et al., Some aspects of the differential geometry of vector fields. On skew symmetric Killing and conformal vector fields, and their relations to various geometrical structures. Leuven: Katholieke Univ. Leuven, Department of Mathematics; Brussel: Katholieke Univ. Brussel, Group of Exact Sciences (1996; Zbl 0960.53019)
Matsumoto, Koji; Mihai, Ion; Roşca, Radu On gradient almost torse forming vector fields. (English) Zbl 0877.53024 Math. J. Toyama Univ. 19, 143-157 (1996). Reviewer: C.Udrişte (Bucureşti) MSC: 53C15 53C12 PDFBibTeX XMLCite \textit{K. Matsumoto} et al., Math. J. Toyama Univ. 19, 143--157 (1996; Zbl 0877.53024)
Reyes, E.; Rosca, R. On 2-paracontact pseudo-Riemannian manifolds with Minkowski index. (English) Zbl 0846.53044 Libertas Math. 15, 47-63 (1995). Reviewer: G.G.Vrănceanu (Bucureşti) MSC: 53C50 53C15 PDFBibTeX XMLCite \textit{E. Reyes} and \textit{R. Rosca}, Libertas Math. 15, 47--63 (1995; Zbl 0846.53044)
Reyes, E.; Roşca, R. Self-orthogonal foliate conformal symplectic almost para-Hermitian manifolds. (English) Zbl 0835.53036 Rend. Circ. Mat. Palermo, II. Ser. 44, No. 1, 147-161 (1995). Reviewer: Z.Olszak (Wrocław) MSC: 53C15 53C50 PDFBibTeX XMLCite \textit{E. Reyes} and \textit{R. Roşca}, Rend. Circ. Mat. Palermo (2) 44, No. 1, 147--161 (1995; Zbl 0835.53036) Full Text: DOI
Mihai, I.; Roşca, R.; Verstraelen, L. On pseudo-Riemannian biconformal cosymplectic manifolds. (English) Zbl 0833.53030 Soochow J. Math. 21, No. 2, 221-252 (1995). Reviewer: G.G.Vrănceanu (Bucureşti) MSC: 53C15 53C25 53C50 PDFBibTeX XMLCite \textit{I. Mihai} et al., Soochow J. Math. 21, No. 2, 221--252 (1995; Zbl 0833.53030)
Mihai, I.; Rosca, R.; Verstraelen, L.; Vrancken, L. Tensor product surfaces of Euclidean planar curves. (English) Zbl 0979.53013 Rend. Semin. Mat. Messina, Ser. II 18, No. 3, 173-185 (1995). MSC: 53A07 53C42 53C15 PDFBibTeX XMLCite \textit{I. Mihai} et al., Rend. Semin. Mat. Messina, Ser. II 3, No. 18, 173--185 (1995; Zbl 0979.53013)
Etayo, F.; Roşca, R. On para-Kählerian manifolds having the symmetric Killing property. (English) Zbl 0881.53021 An. Științ. Univ. Al. I. Cuza Iași, Ser. Nouă, Mat. 41, No. 2, 293-306 (1995). Reviewer: V.Cruceanu (Iaşi) MSC: 53C15 53C50 PDFBibTeX XMLCite \textit{F. Etayo} and \textit{R. Roşca}, An. Științ. Univ. Al. I. Cuza Iași, Ser. Nouă, Mat. 41, No. 2, 293--306 (1995; Zbl 0881.53021)
Rosca, R.; Santos-Garcia, G. Conformal vector fields on para-co-Kählerian manifolds. (English) Zbl 0860.53017 Rend. Semin. Mat. Messina, Ser. II 16, No. 2, 91-102 (1993). MSC: 53C15 53C12 53C40 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{G. Santos-Garcia}, Rend. Semin. Mat. Messina, Ser. II 2, No. 16, 91--102 (1993; Zbl 0860.53017)
Rosca, R. On Lorentzian Kenmotsu manifolds. (English) Zbl 0772.53022 Atti Accad. Peloritana Pericolanti, Cl. Sci. Fis. Mat. Nat. 69, 15-30 (1991). Reviewer: V.V.Goldberg (Newark / New Jersey) MSC: 53C15 53C50 PDFBibTeX XMLCite \textit{R. Rosca}, Atti Accad. Peloritana Pericolanti, Cl. Sci. Fis. Mat. Nat. 69, 15--30 (1991; Zbl 0772.53022)
Goldberg, Vladislav V.; Rosca, Radu Almost conformal 2-cosymplectic pseudo-Sasakian manifolds. (English) Zbl 0701.53067 Note Mat. 8, No. 1, 123-140 (1988). Reviewer: Z.Olszak MSC: 53C25 53C15 53C50 PDFBibTeX XMLCite \textit{V. V. Goldberg} and \textit{R. Rosca}, Note Mat. 8, No. 1, 123--140 (1988; Zbl 0701.53067)
Buchner, K.; Rosca, R. Invariant submanifolds and proper CR foliations on a para-coKählerian manifold with concircular structure vector field. (English) Zbl 0675.53034 Rend. Circ. Mat. Palermo, II. Ser. 37, No. 2, 161-173 (1988). Reviewer: M.de León MSC: 53C15 53C50 PDFBibTeX XMLCite \textit{K. Buchner} and \textit{R. Rosca}, Rend. Circ. Mat. Palermo (2) 37, No. 2, 161--173 (1988; Zbl 0675.53034) Full Text: DOI
Goldberg, Vladislav V.; Rosca, Radu Biconformal vector fields on manifolds endowed with a certain differential conformal structure. (English) Zbl 0659.53036 Houston J. Math. 14, No. 1, 81-95 (1988). Reviewer: C.L.Bejan MSC: 53C15 53A30 PDFBibTeX XMLCite \textit{V. V. Goldberg} and \textit{R. Rosca}, Houston J. Math. 14, No. 1, 81--95 (1988; Zbl 0659.53036)
Calapso, Maria Teresa; Rosca, Radu Cosymplectic quasi-Sasakian pseudo-Riemannian manifolds and coisotropic foliations. (English) Zbl 0699.53045 Rend. Circ. Mat. Palermo, II. Ser. 36, No. 3, 407-422 (1987). Reviewer: Z.Olszak MSC: 53C15 53C12 53B30 PDFBibTeX XMLCite \textit{M. T. Calapso} and \textit{R. Rosca}, Rend. Circ. Mat. Palermo (2) 36, No. 3, 407--422 (1987; Zbl 0699.53045) Full Text: DOI
Goldberg, Vladislav V.; Rosca, Radu Pseudo-Sasakian manifolds endowed with a contact conformal connection. (English) Zbl 0607.53031 Int. J. Math. Math. Sci. 9, 733-747 (1986). Reviewer: K.Ogiue MSC: 53C25 53C15 PDFBibTeX XMLCite \textit{V. V. Goldberg} and \textit{R. Rosca}, Int. J. Math. Math. Sci. 9, 733--747 (1986; Zbl 0607.53031) Full Text: DOI EuDML
Goldberg, Vladislav V.; Rosca, Radu Pseudo-Riemannian manifolds endowed with an almost para f-structure. (English) Zbl 0589.53035 Int. J. Math. Math. Sci. 8, 257-266 (1985). Reviewer: K.Buchner MSC: 53C15 53B30 PDFBibTeX XMLCite \textit{V. V. Goldberg} and \textit{R. Rosca}, Int. J. Math. Math. Sci. 8, 257--266 (1985; Zbl 0589.53035) Full Text: DOI EuDML
Rosca, Radu CR-sous-variétés co-isotropes d’une variété parakählérienne. (CR co-isotropic submanifolds of a para-Kählerian manifold). (French) Zbl 0559.53024 C. R. Acad. Sci., Paris, Sér. I 298, 149-151 (1984). MSC: 53C15 53B35 PDFBibTeX XMLCite \textit{R. Rosca}, C. R. Acad. Sci., Paris, Sér. I 298, 149--151 (1984; Zbl 0559.53024)
Rosca, Radu Riemannian or pseudo-Riemannian manifolds endowed with a D-contact structure. (English) Zbl 0539.53028 Soochow J. Math. 9, 211-220 (1983). Reviewer: S.Ianus MSC: 53C15 53C50 PDFBibTeX XMLCite \textit{R. Rosca}, Soochow J. Math. 9, 211--220 (1983; Zbl 0539.53028)
Rosca, Radu Codimension 2, CR-submanifolds with null covariant decomposable vertical distribution of a neutral manifold M. (English) Zbl 0512.53052 Rend. Mat. Appl., VII. Ser. 2, 788-797 (1982). MSC: 53C40 53C15 53B30 PDFBibTeX XMLCite \textit{R. Rosca}, Rend. Mat. Appl., VII. Ser. 2, 788--797 (1982; Zbl 0512.53052)
Rosca, Radu CH-hypersurfaces à champ normal covariant decomposable incluses dans une variété pseudo-riemannienne neutre. (French) Zbl 0466.53008 C. R. Acad. Sci., Paris, Sér. I 292, 287-290 (1981). MSC: 53B25 53C15 53C42 PDFBibTeX XMLCite \textit{R. Rosca}, C. R. Acad. Sci., Paris, Sér. I 292, 287--290 (1981; Zbl 0466.53008)
Arca, Giuseppe; Rosca, Radu k-structures de contact isotropes sur une variété lorentzienne. (French) Zbl 0433.53044 Boll. Unione Mat. Ital., V. Ser., A 17, 260-266 (1980). MSC: 53C50 53C15 PDFBibTeX XMLCite \textit{G. Arca} and \textit{R. Rosca}, Boll. Unione Mat. Ital., V. Ser., A 17, 260--266 (1980; Zbl 0433.53044)
Rosca, Radu Sous-variétés pseudo-minimales et minimales d’une variété pseudo- riemannienne structuree par une connexion spin-euclidienne. (French) Zbl 0428.53032 C. R. Acad. Sci., Paris, Sér. A 290, 331-333 (1980). MSC: 53C50 53C15 PDFBibTeX XMLCite \textit{R. Rosca}, C. R. Acad. Sci., Paris, Sér. A 290, 331--333 (1980; Zbl 0428.53032)
Rosca, Radu Variétés para-cokähleriennes à champ canonique bi quasi parallèle. (French) Zbl 0428.53014 C. R. Acad. Sci., Paris, Sér. A 289, 695-698 (1979). MSC: 53C15 53C55 53B35 PDFBibTeX XMLCite \textit{R. Rosca}, C. R. Acad. Sci., Paris, Sér. A 289, 695--698 (1979; Zbl 0428.53014)
Morvan, Jean-Marie; Rosca, Radu Structures presque cosymplectiques à couple de champs quasi-recurrents reciproques. (French) Zbl 0405.53017 Univ. Politec. Torino, Rend. Sem. Mat. 36, 225-234 (1978). MSC: 53B99 53C15 PDFBibTeX XML
Rosca, Radu; Morvan, Jean-Marie Variétés lorentziennes structurees par une connexion conforme plate. (French) Zbl 0372.53015 C. R. Acad. Sci., Paris, Sér. A 286, 519-522 (1978). MSC: 53C15 53A30 53C50 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{J.-M. Morvan}, C. R. Acad. Sci., Paris, Sér. A 286, 519--522 (1978; Zbl 0372.53015)
Rosca, R. Para-Kählerian manifolds carrying a pair of concurrent self-orthogonal vector fields. (English) Zbl 0316.53029 Abh. Math. Semin. Univ. Hamb. 46, 205-215 (1977). MSC: 53C15 53C55 PDFBibTeX XMLCite \textit{R. Rosca}, Abh. Math. Semin. Univ. Hamb. 46, 205--215 (1977; Zbl 0316.53029) Full Text: DOI
Vranceanu, Gheorghe; Rosca, Radu Introduction in relativity and pseudo-Riemannian geometry. (English) Zbl 0411.53002 Bucharest: Editura Academiei Rep. Soc. Romania. 217 p. Lei 27.00 (1976). MSC: 53-02 53B30 53C50 53C15 83C05 PDFBibTeX XML
Rosca, Radu; Vanhecke, Lieven Sur une variété presque paracokählerienne munie d’une connexion self- orthogonale involutive. (French) Zbl 0369.53055 An. Stiint. Univ. Al. I. Cuza Iasi, n. Ser., Sect. Ia 22, 49-58 (1976). MSC: 53C50 53C15 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{L. Vanhecke}, An. Științ. Univ. Al. I. Cuza Iași, N. Ser., Secț. Ia 22, 49--58 (1976; Zbl 0369.53055)
Rosca, Radu; Ianus, Stere Variétés para-kähleriennes structurees par une connexion geodesique. (French) Zbl 0316.53030 C. R. Acad. Sci., Paris, Sér. A 280, 1621-1623 (1975). MSC: 53C15 53C55 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{S. Ianus}, C. R. Acad. Sci., Paris, Sér. A 280, 1621--1623 (1975; Zbl 0316.53030)
Rosca, Radu Sur les hypersurfaces isotropes de defaut 1 incluses dans un espace hyperbolique de type normal. (French) Zbl 0287.53018 Ann. Inst. Henri Poincaré, Nouv. Sér., Sect. A 20, 237-243 (1974). MSC: 53B30 53B25 53C15 PDFBibTeX XMLCite \textit{R. Rosca}, Ann. Inst. Henri Poincaré, Nouv. Sér., Sect. A 20, 237--243 (1974; Zbl 0287.53018) Full Text: Numdam EuDML
Rosca, Radu; Rouxel, Bernard; Vanhecke, Lieven Sur les variétés douees d’une immersion completement pseudo-isotrope dans un espace de Minkowski. (French) Zbl 0274.53053 Rev. Roum. Math. Pures Appl. 19, 55-64 (1974). MSC: 53B30 53B25 53C15 53C40 53C50 PDFBibTeX XMLCite \textit{R. Rosca} et al., Rev. Roum. Math. Pures Appl. 19, 55--64 (1974; Zbl 0274.53053)
Rosca, Radu; Vanhecke, Lieven On totally null manifolds of eodesic codimension 1 included in an even dimensional Lorentzian manifold. (English) Zbl 0271.53023 Tensor, New Ser. 27, 189-196 (1973). MSC: 53B30 53C15 53B25 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{L. Vanhecke}, Tensor, New Ser. 27, 189--196 (1973; Zbl 0271.53023)
Rosca, Radu Sur les variétés isotropes de defaut et de codimension 2 et qui sont munies d’une structure presque cosymplectique. (French) Zbl 0265.53021 Acad. roy. Belgique, Bull. Cl. Sci., V. Ser. 59, 354-364 (1973). MSC: 53B30 53C15 53B35 53B25 PDFBibTeX XMLCite \textit{R. Rosca}, Bull. Cl. Sci., V. Sér., Acad. R. Belg. 59, 354--364 (1973; Zbl 0265.53021)
Rosca, Radu On almost cosymplectic Lorentzian hypersurfaces immersed in a Lorentzian manifold. (English) Zbl 0251.53032 Kōdai Math. Semin. Rep. 25, 95-103 (1973). MSC: 53C15 53C40 53C50 PDFBibTeX XMLCite \textit{R. Rosca}, Kōdai Math. Semin. Rep. 25, 95--103 (1973; Zbl 0251.53032) Full Text: DOI
Rosca, Radu; Vanhecke, Lieven; Verstraelen, Leopold Sur les hypersurfaces minimales dans un espace elliptique à quatre et à cinq dimensions. (French) Zbl 0274.53056 Ann. Mat. Pura Appl., IV. Ser. 94, 361-376 (1972). MSC: 53C40 53B25 53C15 53A35 PDFBibTeX XMLCite \textit{R. Rosca} et al., Ann. Mat. Pura Appl. (4) 94, 361--376 (1972; Zbl 0274.53056) Full Text: DOI