We study curvature homogeneous spaces or locally homogeneous spaces whose curvature tensors are invariant by the action of ``large" Lie subalgebras $\frak{h}$ of $\frak{so}(n)$. In this paper we deal with the cases of $\frak{h}=\frak{so}(r) \oplus \frak{so}(n-r)$ $(2\leq r \leq n-r)$, $\frak{so}(n-2)$, and the Lie algebras of Lie groups acting transitively on spheres, and classify such curvature homogeneous spaces or locally homogeneous spaces.
@article{119320, author = {Kazumi Tsukada}, title = {Curvature homogeneous spaces whose curvature tensors have large symmetries}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {43}, year = {2002}, pages = {283-297}, zbl = {1090.53050}, mrnumber = {1922128}, language = {en}, url = {http://dml.mathdoc.fr/item/119320} }
Tsukada, Kazumi. Curvature homogeneous spaces whose curvature tensors have large symmetries. Commentationes Mathematicae Universitatis Carolinae, Tome 43 (2002) pp. 283-297. http://gdmltest.u-ga.fr/item/119320/
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