The covering properites of product spaces between one P-space and one Σ-space;

Vasile and Ioana proved that a product space of two complex strict convex spaces is complex strict convex space by the 2-norm.

The properties of product space and quotient space of normed space in functional analysis are applied to Z - space.

Property P_λ and characterizations of inner product spaces;

Mobius maps in the inner product spaces;

In this paper characterizations of inner product spaces are obtained by studying properties of generalized orthogonalities, a quantitative characterization of the difference between Birkhoff orthogonality and Isosceles orthogonality is given, the definition of metric ellipse is introduced and basic properties of metric ellipses are studied.

Generalization of Some Characterisation Theorems of Inner Product Spaces and Their Remarks;

Note on H orthogonality and characterizations of inner product spaces;

Firstly,the generic conception of symmetry for a real sequence was proposed,and then,the symmetry-decomposition and the symmetric degree sequence are presented,which are deduced from the projection theory,the orthogonal-decomposition theory in inner product space and .

From the plan design,space area,storey height,wideness,direction and other aspects the rationality and amenity of house type are analyzed in order to design favorable house type and create natural and comfortable dwelling environment for residents.