Published: 1985 Received: April 26, 1984Available on J-STAGE: October 20, 2006Accepted: -
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Date of correction: October 20, 2006Reason for correction: -Correction: CITATIONDetails: Wrong : 1) A. Avez, Characteristic classes and Weyl tensor, Proc. Nat. Acad. Sci. U. S. A., 66 (1970), 265-268. 2) R. Bach, Zur Weylschen Relativitätstheorie und der Weylschen Erweiterung des Krümmungstensorbegriffs, Math. Z., 9 (1921), 110-135. 3) M. Berger and D. Ebin, Some decompositions of the space of symmetric tensors on a Riemannian manifold, J. Diff. Geom., 3 (1969), 379-392. 4) N. Hitchin, Compact four-dimensional Einstein manifolds, J. Diff. Geom., 9 (1974), 435-441. 5) S. Kobayashi and K. Nomizu, Foundations of differential geometry, Vol. 2, Interscience, 1969. 6) N. H. Kuiper, On compact conformally Euclidean spaces of dimension >2, Ann. of Math., 52 (1950), 478-490. 7) I. M. Singer and J. A. Thorpe, The curvature of 4-dimensional Einstein spaces, Global Analysis, Papers in Honor of K. Kodaira, Princeton Univ. Press, 1969, 355-365.
Right : [1] A. Avez, Characteristic classes and Weyl tensor, Proc. Nat. Acad. Sci. U. S. A., 66 (1970), 265-268. [2] R. Bach, Zur Weylschen Relativitätstheorie und der Weylschen Erweiterung des Krümmungstensorbegriffs, Math. Z., 9 (1921), 110-135. [3] M. Berger and D. Ebin, Some decompositions of the space of symmetric tensors on a Riemannian manifold, J. Diff. Geom., 3 (1969), 379-392. [4] N. Hitchin, Compact four-dimensional Einstein manifolds, J. Diff. Geom., 9 (1974), 435-441. [5] S. Kobayashi and K. Nomizu, Foundations of differential geometry, Vol. 2, Interscience, 1969. [6] N. H. Kuiper, On compact conformally Euclidean spaces of dimension >2, Ann. of Math., 52 (1950), 478-490. [7] I. M. Singer and J. A. Thorpe, The curvature of 4-dimensional Einstein spaces, Global Analysis, Papers in Honor of K. Kodaira, Princeton Univ. Press, 1969, 355-365.
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