The Local biorder-convexity is a base of the biordering positive decomposition of linear functionals.
拓扑线性空间的局部双序凸性，是该空间上连续线性泛函实现双序正分解的基础。
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The convexity of curves and surfaces is an important property in the field of Computer Aided Geometric Design (CAGD). This paper tries to tackle the positive and convex problem of polynomials.