During the construction of the socialist harmonious society, it's of great special significance to study the protection of tort obligation, but the modern civil law system makes the tort obligation a disadvantageous station.
Some solutions such as forming and improving cooperative community, investing the assets for special purpose in operation by both companies and fanners , setting up the standard system and building the long -term contract system are suggested.
Education contracta have the common characteristics of all the civil contracts, with its distinctive traits in objects, subjects, content, establishment and validity, enforcement, obligation, interference,, of the government, the planning of the nation, etc. In general, the illegistration of education contract should take scientific way of thinking , obey a special principle and adopt its unique and suitable pattern.
Therefore, electronic signature and electronic certification - the special methods for identifying the status of both parties emerged in the network surroundings. However, there are still many other problems need to be solved.
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.