How to choose suitable degree of fitting implicit polynomial curves and surfaces is a key problem when the objects are described and recognized by implicit polynomials, but the problem is not solved in theory.

Some properties of polynomial such as f(x)=φ(x)(x-a1)(x-a2)…(x-an)+1 are discussed and some theorem is obtained if n>6,φ(x)>0 and the degree of φ(x) is less than a half of n,then f(x) is irreducible on rational number field.

Let g(x) and h(x) be polynomials over F with the degrees m and n respectively.

This paper probes into whether the times of pre-jump hand-swing can affect the grade of stationary long jump.

The variation characteritics of frost times and period in Ningxia region from 1961 to 2004 were analyzed.

The times of repetitive measurement is discussed based on the three view points.

Literature[2] gives a definition of the order of autogenic number and an approach of determining it,and this paper put forwards another method.

Through direct sum factoring in finite able group,the number of elements with different order in is calculated.

Let n be an odd perfect number,and let π,α denote the Euler s factor and its order of n respectively.

Clinical significance of routine temperature monitoring frequency through evidence-based nursing method;

Improvement on the Optimized Frequency of Placing-in and Taking-out of Wagons;

Repetition survey frequency is a mondial problem of physical eperiment.