Acta Universitatis Danubius. Œconomica, Vol. 2, No. 1
Abstract
First and foremost, impact studies pointed out that the adhering of
Romania to the European Union in 2007 is the most advantageous prospect to consider both
financially and in terms of economic development, as the increase of the living standards and
of modernizing processes in Romania is far more evident in this case than in a postponed
adhering or in a seclusion scenario. Consequently, if we fail the European Union adhering
in 2007, we would have to face higher costs.
References
1 Bejancu, A., Duggal, K. L., Lightlike Hypersurfaces of Semi-Riemannian
Manifolds, Bull.Inst. Polytechnic Iasi, Romania;
2 Bejancu, A., Duggal, K. L., Lightlike Submanifolds of Semi-Riemannian
Manifolds and Applications, Kluwer Acad.Publishers, Dordrecht, 1996;
3 Bejancu, A., Duggal, K. L., Lightlike Submanifolds of Semi-Riemannian
Manifolds, Acta Applicandae Mathematicae 38, 1995, 197-215;
4 Bonnor, W. B., Null Hypersurfaces in Minkowski Space Time, Tensor N.S.,
24, 1972, 329-345;
5 Brito G. B., Walczak, P. G., Totally geodesic foliations with integrable normal
bundles, Bol. Soc. Bras. Mat., Vol. 17, No1 (1986), 41-46;
6 Cagnac, F., Géométrie de Hypersurfaces Isotropes, C.R.Acad.Sci.Paris, 201,
1965, 3045-3048;
7 Cairns, G., Ghys, E., Totally geodesic foliations on 4-manifolds, J. Diff.
Geom., 23, 3 (1986), 241-254;
8 Cairns, G., Totally Umbilic Riemannian Foliations, Michigan Math.J., 37
(1990), 145-159;
9 Carriere, Y., Ghys, E., Feuilletages Totalement Géodésiques, An. Acad.
Brasil, 53 (1981), No3, 427-432;
10 Chen, B. Y., Geometry of Submanifolds, Marcel Dekker, New York, 1973;
11 Eisenhart, L. P., Riemannian Geometry, Princeton University Press, 1926;
12 Ferus, D., Totally Geodesic Foliations, Math. Ann., 188 (1970), 313-316;
13 Haefliger, A.,Varietes feuilletees, Ann. Scuola Norm. Sup. Pisa Sci. Fis. Mat.,
3, 16, (1962), 367-397;
14 Haefliger, A., Some remarks on foliations with minimal leaves, J.Diff. Geom.,
2, (1980), 269-284
15 Hermann, R., On the Differential Geometry of Foliations, Ann. of Math., 72, 2
(1960), 445-457
16 Ioan, C. A., Totally Umbilical Lightlike Submanifolds, Bull. Math. Soc. Sc.
Math. Roumanie, Tome 37 (87), No. 1-4, 1996, 151-172;
17 Ioan, C. A., Degenerate Submanifolds of Semi-Riemannian Manifolds, Tensor,
N.S., Vol. 58, No.1 (1997), 1-7;
18 Ioan, C. A., Totally Geodesic Foliations and Minimal Foliations on the Semi-
Riemannian Manifolds, Rev. Roum. Math. Pures et Appl., XLII, 3-4 (1997), 281-
299
19 Ioan, C. A., Totally Geodesic Foliations on Semi-Riemannian Manifolds,
Tensor, N. S., Vol. 58, No. 1 (1997), 31-34;
20 Johnson, D. L., Whitt, L. B., Totally Geodesic Foliations on 3-Manifolds,
Proc. Amer. Math. Soc., 76, 2 (1979), 355-357;
21 Johnson, D. L.,Whitt, L. B.,Totally Geodesic Foliations, J. Diff. Geom., 15
(1980), 225-235;
22 Katsuno, K., Null hypersurfaces in Minkowski space-time, Tensor N.S., 40, 1
(1983), 7-12;
23 Kobayashi, S., Nomizu, K., Foundations of Differential Geometry,
Interscience Publishers, New York, vol. I, 1963, vol. II, 1969;
24 Lang, S., Differential Manifolds, Addison Wesley, 1972;
25 Lawson, H. B., Foliations, Bull. Amer. Math. Soc., (80), 3, 1974, 369-418;
26 Molino, P., Riemannian foliations, Boston, Basel, Birkhauser, 1988;
27 O’Neill, B.,Semi-Riemannian Geometry with Applications to Relativity,
Academic Press, 1983;
28 Reinhart, B. L., Differential Geometry of Foliations, Springer-Verlag, 1983;
29 Reinhart, B.L., Foliated manifolds with bundle-like metrics, Ann. of Math.,
(2), 69, 1959, 119-132;
30 Reinhart, B.L., The second fundamental form of a plane field, J. Diff. Geom.,
12 (1977), 619-627;
31 Rosca, R., On Null Hypersurfaces of a Lorentzian Manifold, Tensor N.S., 23,
1972, 66-74;
32 Rosca, R., Sur les Hypersurfaces Isotropes de Défaut 1 Incluses dans une
Variété Lorentzienne, C. R. Acad. Sci. Paris, 272, 1979, 393-396;
33 Solomon, B., On foliations of Rn+1 by minimal hypersurfaces, Comment.
Math. Helvetici, 61 (1986), 67-83;
34 Steenrod, N., The topology of fibre bundles, Princeton University Press, 1951;
35 Vaisman, I., Varietes Riemannienes Feuilletees, Czech. Math. J., 21 (96)
(1971), 46-75;
36 Wolak, R., Normal bundles of foliations of order r, Demonstratio
Mathematica, 18, 4 (1985), 977-994.
Manifolds, Bull.Inst. Polytechnic Iasi, Romania;
2 Bejancu, A., Duggal, K. L., Lightlike Submanifolds of Semi-Riemannian
Manifolds and Applications, Kluwer Acad.Publishers, Dordrecht, 1996;
3 Bejancu, A., Duggal, K. L., Lightlike Submanifolds of Semi-Riemannian
Manifolds, Acta Applicandae Mathematicae 38, 1995, 197-215;
4 Bonnor, W. B., Null Hypersurfaces in Minkowski Space Time, Tensor N.S.,
24, 1972, 329-345;
5 Brito G. B., Walczak, P. G., Totally geodesic foliations with integrable normal
bundles, Bol. Soc. Bras. Mat., Vol. 17, No1 (1986), 41-46;
6 Cagnac, F., Géométrie de Hypersurfaces Isotropes, C.R.Acad.Sci.Paris, 201,
1965, 3045-3048;
7 Cairns, G., Ghys, E., Totally geodesic foliations on 4-manifolds, J. Diff.
Geom., 23, 3 (1986), 241-254;
8 Cairns, G., Totally Umbilic Riemannian Foliations, Michigan Math.J., 37
(1990), 145-159;
9 Carriere, Y., Ghys, E., Feuilletages Totalement Géodésiques, An. Acad.
Brasil, 53 (1981), No3, 427-432;
10 Chen, B. Y., Geometry of Submanifolds, Marcel Dekker, New York, 1973;
11 Eisenhart, L. P., Riemannian Geometry, Princeton University Press, 1926;
12 Ferus, D., Totally Geodesic Foliations, Math. Ann., 188 (1970), 313-316;
13 Haefliger, A.,Varietes feuilletees, Ann. Scuola Norm. Sup. Pisa Sci. Fis. Mat.,
3, 16, (1962), 367-397;
14 Haefliger, A., Some remarks on foliations with minimal leaves, J.Diff. Geom.,
2, (1980), 269-284
15 Hermann, R., On the Differential Geometry of Foliations, Ann. of Math., 72, 2
(1960), 445-457
16 Ioan, C. A., Totally Umbilical Lightlike Submanifolds, Bull. Math. Soc. Sc.
Math. Roumanie, Tome 37 (87), No. 1-4, 1996, 151-172;
17 Ioan, C. A., Degenerate Submanifolds of Semi-Riemannian Manifolds, Tensor,
N.S., Vol. 58, No.1 (1997), 1-7;
18 Ioan, C. A., Totally Geodesic Foliations and Minimal Foliations on the Semi-
Riemannian Manifolds, Rev. Roum. Math. Pures et Appl., XLII, 3-4 (1997), 281-
299
19 Ioan, C. A., Totally Geodesic Foliations on Semi-Riemannian Manifolds,
Tensor, N. S., Vol. 58, No. 1 (1997), 31-34;
20 Johnson, D. L., Whitt, L. B., Totally Geodesic Foliations on 3-Manifolds,
Proc. Amer. Math. Soc., 76, 2 (1979), 355-357;
21 Johnson, D. L.,Whitt, L. B.,Totally Geodesic Foliations, J. Diff. Geom., 15
(1980), 225-235;
22 Katsuno, K., Null hypersurfaces in Minkowski space-time, Tensor N.S., 40, 1
(1983), 7-12;
23 Kobayashi, S., Nomizu, K., Foundations of Differential Geometry,
Interscience Publishers, New York, vol. I, 1963, vol. II, 1969;
24 Lang, S., Differential Manifolds, Addison Wesley, 1972;
25 Lawson, H. B., Foliations, Bull. Amer. Math. Soc., (80), 3, 1974, 369-418;
26 Molino, P., Riemannian foliations, Boston, Basel, Birkhauser, 1988;
27 O’Neill, B.,Semi-Riemannian Geometry with Applications to Relativity,
Academic Press, 1983;
28 Reinhart, B. L., Differential Geometry of Foliations, Springer-Verlag, 1983;
29 Reinhart, B.L., Foliated manifolds with bundle-like metrics, Ann. of Math.,
(2), 69, 1959, 119-132;
30 Reinhart, B.L., The second fundamental form of a plane field, J. Diff. Geom.,
12 (1977), 619-627;
31 Rosca, R., On Null Hypersurfaces of a Lorentzian Manifold, Tensor N.S., 23,
1972, 66-74;
32 Rosca, R., Sur les Hypersurfaces Isotropes de Défaut 1 Incluses dans une
Variété Lorentzienne, C. R. Acad. Sci. Paris, 272, 1979, 393-396;
33 Solomon, B., On foliations of Rn+1 by minimal hypersurfaces, Comment.
Math. Helvetici, 61 (1986), 67-83;
34 Steenrod, N., The topology of fibre bundles, Princeton University Press, 1951;
35 Vaisman, I., Varietes Riemannienes Feuilletees, Czech. Math. J., 21 (96)
(1971), 46-75;
36 Wolak, R., Normal bundles of foliations of order r, Demonstratio
Mathematica, 18, 4 (1985), 977-994.
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Published
2021-05-24
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Collective Authors. (2021). Acta Universitatis Danubius. Œconomica, Vol. 2, No. 1: Array. Acta Universitatis Danubius. Œconomica, 2(1). Retrieved from https://dj.univ-danubius.ro/index.php/AUDOE/article/view/1027
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