球体相交与GPS
通过测量到卫星的距离，可以计算出经过你当前位置的圆形轨迹。这是因为你处于地球表面和以卫星为中心、半径为d的球体这两个球体的交点上，而两个球体的相交形成一个圆。
相关报道
The article discusses linear algebra concepts applied to polynomials, specifically the set P_n(ℝ) of real polynomials with degree ≤ n. It explores how these polynomials can be expressed using n+1 scalar coefficients and examines their properties as a vector space.
Lagrange interpolating polynomials provide a method to find a polynomial that perfectly fits a given set of distinct data points. The approach constructs a polynomial of degree at most n that passes through n+1 specified points. This technique is widely used in numerical analysis and approximation theory.