Acknowledgement
Supported by : Korea Research Foundation(KRF)
References
- S. S. Chern and J. Simons, Characteristic forms and geometric invariants, Ann. of Math. (2) 99 (1974), 48-69. https://doi.org/10.2307/1971013
- D. P. Chi and Y. D. Yoon, On an affine connection which admits a volume-like form, Canad. Math. Bull. 33 (1990), no. 4, 482-488. https://doi.org/10.4153/CMB-1990-077-6
- B. A. Dubrovin, A. T. Fomenko, and S. P. Novikov, Modern Geometry - Methods and Applications, Part III, Springer-Verlag, 1990.
- W. Greub, S. Halperin, and R. Vanstone, Connections, Curvature and Cohomology. Vol. I: De Rham cohomology of manifolds and vector bundles, Academic Press, 1972.
- S. Kobayashi and K. Nomizu, Foundations of Differential Geometry, Vol I, Interscience Publishers, 1963.
- H. Shima, On certain locally flat homogeneous manifolds of solvable Lie groups, Osaka J. Math. 13 (1976), no. 2, 213-229.
- W. P. Thurston, Geometry and topology of 3-manifolds. Lecture Notes, Princeton University, 1979.