Obscure Poetry is a Chinese modern poetic school, which come into fashion at the end of the 70's and the beginning of the 80's in the 20th century under the influential of many kinds of factors, and it is a modern literary trend which is originated in the special cultural environment of China, the unique experiences of poets in the Great Proletarian Cultural Revolution, and nourished by the western modern poetry.
Motivated by the physical concept of special geometry, two mathematical constructions are studied which relate real hypersurfaces to tube domains and complex Lagrangian cones, respectively.
The theory is applied to the case of cubic hypersurfaces, which is the one most relevant to special geometry, obtaining the solution of the two classification problems and the description of the corresponding homogeneous special K?hler manifolds.
The first part of this paper describes the construction of pseudo-Riemannian homogeneous spaces with special curvature properties such as Einstein spaces, using corresponding known compact Riemannian ones.
In the special case whenFn is the projective spaceRPn, one also obtains the upper bound.
Except for the Borel and some special cases a corresponding result is not known for the semi-centre of the enveloping algebra ofp.