严格凹函数是一个定义在某个向量空间的凸子集C上的一类实值函数。若对于凸子集C中任意两个向量p,q, 满足f((p+q)/2)<(f(p)+f(q))/2, 则称f(x)是定义在凸子集C中的严格凹函数。
该准则或价值函数是关于均衡器抽头权矢量和误差概率的严格凹函数。
The criterion or cost-function with respect to the complex tap-weight vector of the equalizer and to the error probability is strictly a convex function.
在有效前沿上，风险是收益的严格单调递增凸函数，收益是风险的严格单调递增凹函数。
On the effect boundary, risk is return's rigid monotony increase by degrees convex function , return is risk's rigid monotony increase by degrees concave function.
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