Calapso, Maria Teresa; Defever, Filip; Roşca, Radu Pfaffian transformation. (English) Zbl 1120.53007 Stud. Univ. Babeș-Bolyai, Math. 51, No. 2, 29-38 (2006). Reviewer: Andrew Bucki (Edmond) MSC: 53B20 PDFBibTeX XMLCite \textit{M. T. Calapso} et al., Stud. Univ. Babeș-Bolyai, Math. 51, No. 2, 29--38 (2006; Zbl 1120.53007)
Calapso, M. T; Defever, F.; Rosca, R. On symplectic manifolds endowed with an exterior recurrent structure. (English) Zbl 1111.53013 An. Științ. Univ. Al. I. Cuza Iași, Ser. Nouă, Mat. 51, No. 2, 417-426 (2005). Reviewer: Rolf Walter (Dortmund) MSC: 53B20 53D05 PDFBibTeX XMLCite \textit{M. T Calapso} et al., An. Științ. Univ. Al. I. Cuza Iași, Ser. Nouă, Mat. 51, No. 2, 417--426 (2005; Zbl 1111.53013)
Calapso, Maria Teresa; Defever, F.; Rosca, R. Contact transformation of a presymplectic form with quasi-Sasakian structure. (English) Zbl 1073.53024 Balkan J. Geom. Appl. 9, No. 1, 1-7 (2004). Reviewer: Vladislav V. Goldberg (Livingston) MSC: 53B20 PDFBibTeX XMLCite \textit{M. T. Calapso} et al., Balkan J. Geom. Appl. 9, No. 1, 1--7 (2004; Zbl 1073.53024) Full Text: EuDML
Defever, Filip; Rosca, Radu Even-dimensional manifolds structured by a constant \({\mathcal T}\)-parallel connection. (English) Zbl 1060.53021 Math. J. Okayama Univ. 45, 133-144 (2003). Reviewer: L. Vanhecke (Leuven) MSC: 53B20 53C05 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Rosca}, Math. J. Okayama Univ. 45, 133--144 (2003; Zbl 1060.53021)
Defever, F.; Rosca, R. Locally conformal manifolds endowed with a skew-symmetric vector field. (English) Zbl 1066.53044 Publ. Math. Debr. 63, No. 4, 523-536 (2003). Reviewer: Lajos Tamássy (Debrecen) MSC: 53B20 53C25 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Rosca}, Publ. Math. Debr. 63, No. 4, 523--536 (2003; Zbl 1066.53044)
Rosca, R.; Defever, Filip Riemmannian manifolds structured by a \(T\)-parallel exterior recurrent connection. (English) Zbl 1098.53015 Note Mat. 21, No. 1, 59-70 (2002). Reviewer: Krishan Lal Duggal (Windsor/Ontario) MSC: 53B20 PDFBibTeX XMLCite \textit{R. Rosca} and \textit{F. Defever}, Note Mat. 21, No. 1, 59--70 (2002; Zbl 1098.53015)
Defever, Filip; Deszcz, Ryszard; Verstraelen, Leopold; Yaprak, Sahnur On the equivalence of semisymmetry and Ricci-semisymmetry for hypersurfaces. (English) Zbl 1038.53020 Indian J. Math. 43, No. 1, 1-12 (2001). Reviewer: Mircea Crâşmăreanu (Iaşi) MSC: 53B20 53C40 53C50 PDFBibTeX XMLCite \textit{F. Defever} et al., Indian J. Math. 43, No. 1, 1--12 (2001; Zbl 1038.53020)
Defever, Filip; Rosca, Radu Framed \((2M+3)\)-dimensional manifolds endowed with a vertical cyclic connection structure. (English) Zbl 1012.53018 Publ. Math. Debr. 59, No. 1-2, 89-102 (2001). MSC: 53B20 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Rosca}, Publ. Math. Debr. 59, No. 1--2, 89--102 (2001; Zbl 1012.53018)
Dabrowska, Marta; Defever, Filip; Deszcz, Ryszard; Kowalczyk, D. Semisymmetry and Ricci-semisymmetry for hypersurfaces of semi-Euclidean spaces. (English) Zbl 0951.53015 Publ. Inst. Math., Nouv. Sér. 67(81), 103-111 (2000). Reviewer: Miroslava Torgašev-Petrović (Kragujevac) MSC: 53B25 53B20 53B30 PDFBibTeX XMLCite \textit{M. Dabrowska} et al., Publ. Inst. Math., Nouv. Sér. 67(81), 103--111 (2000; Zbl 0951.53015) Full Text: EuDML
Defever, Filip Ricci-semisymmetric hypersurfaces. (English) Zbl 0963.53010 Balkan J. Geom. Appl. 5, No. 1, 81-91 (2000). Reviewer: Christos Baikoussis (Ioannina) MSC: 53B25 53B20 53B30 53A07 PDFBibTeX XMLCite \textit{F. Defever}, Balkan J. Geom. Appl. 5, No. 1, 81--91 (2000; Zbl 0963.53010) Full Text: EuDML EMIS
Defever, Filip Conformally flat hypersurfaces of \(\mathbb{E}^4\) with constant mean curvature. (English) Zbl 0980.53007 Result. Math. 37, No. 3-4, 322-330 (2000). MSC: 53A07 53B20 PDFBibTeX XMLCite \textit{F. Defever}, Result. Math. 37, No. 3--4, 322--330 (2000; Zbl 0980.53007) Full Text: DOI
Defever, Filip Conformally flat hypersurfaces with constant Gauss-Kronecker curvature. (English) Zbl 0978.53009 Bull. Aust. Math. Soc. 61, No. 2, 207-216 (2000). Reviewer: Oscar J.Garay (Bilbao) MSC: 53A07 53B20 PDFBibTeX XMLCite \textit{F. Defever}, Bull. Aust. Math. Soc. 61, No. 2, 207--216 (2000; Zbl 0978.53009) Full Text: DOI
Defever, Filip; Rosca, Radu On affine skew symmetric Killing vector fields. (English) Zbl 1014.53015 Bull. Inst. Math., Acad. Sin. 28, No. 1, 21-33 (2000). Reviewer: Marcela Popescu (Craiova) MSC: 53B20 53B30 53C20 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Rosca}, Bull. Inst. Math., Acad. Sin. 28, No. 1, 21--33 (2000; Zbl 1014.53015)
Defever, Filip Theory of semisymmetric conformally flat and biharmonic submanifolds. (English) Zbl 0980.53006 Balkan J. Geom. Appl. 4, No. 1, 19-30 (1999). MSC: 53A07 53B20 53B25 PDFBibTeX XMLCite \textit{F. Defever}, Balkan J. Geom. Appl. 4, No. 1, 19--30 (1999; Zbl 0980.53006) Full Text: EuDML EMIS
Defever, F.; Deszcz, R.; Senturk, Z.; Verstraelen, L.; Yaprak, S. On a problem of P. J. Ryan. (English) Zbl 0896.53024 Kyungpook Math. J. 37, No. 2, 371-376 (1997). Reviewer: A.Bucki (Oklahoma City) MSC: 53B30 53B20 PDFBibTeX XMLCite \textit{F. Defever} et al., Kyungpook Math. J. 37, No. 2, 371--376 (1997; Zbl 0896.53024)
Defever, Filip; Deszcz, Ryszard On Riemannian manifolds satisfying a certain curvature condition imposed on the Weyl curvature tensor. (English) Zbl 0796.53016 Acta Univ. Palacki. Olomuc., Fac. Rerum Nat., Math. 32, 27-34 (1993). Reviewer: Gh.Pitiş (Braşov) MSC: 53B20 53C25 53C80 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Deszcz}, Acta Univ. Palacki. Olomuc., Fac. Rerum Nat., Math. 32, 27--34 (1993; Zbl 0796.53016) Full Text: EuDML
Defever, Filip; Deszcz, Ryszard A note on geodesic mappings of pseudosymmetric Riemannian manifolds. (English) Zbl 0810.53008 Colloq. Math. 62, No. 2, 313-319 (1991). Reviewer: J.Mikeš (Zlin) MSC: 53B20 53C22 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Deszcz}, Colloq. Math. 62, No. 2, 313--319 (1991; Zbl 0810.53008) Full Text: DOI EuDML Link
Defever, F.; Deszcz, R. On warped product manifolds satisfying a certain curvature condition. (English) Zbl 0780.53017 Atti Accad. Peloritana Pericolanti, Cl. Sci. Fis. Mat. Nat. 69, 213-236 (1991). Reviewer: M.Hotloś (Wrocław) MSC: 53B20 PDFBibTeX XMLCite \textit{F. Defever} and \textit{R. Deszcz}, Atti Accad. Peloritana Pericolanti, Cl. Sci. Fis. Mat. Nat. 69, 213--236 (1991; Zbl 0780.53017)