最小生成树：利用普鲁姆算法，完成将给定节点和边的权值的图生成最小生成树，用于各项公共事业最少经费的设计方法-minimum spanning tree : pass algorithm, Givens completed nodes and the right side of the value of the minimum spanning tree generation for public utilities at least for the design method

数值线性代数中的givens变换，matlab语言实现(Givens transformation in numerical linear algebra and implementation of MATLAB language)