摘要
本文得到实Hilbert空间之闭子空间对闭区间的最佳同时逼近公式。
In this paper, the formula for best simultaneous approximation to a closed interval byelements of a closed subspace in real Hilbert space is obtained.
关键词
最佳同时逼近
希尔伯特空间
闭子空间
闭区间
real hilbert space
best simultaneous approximation
orthogonal projection
the pythagoren theorem
