When the factor to be cancelled is a base vector, we dot-multiply by another base vector to produce a kronecker delta . 當要消去的因子是一個基矢量時,用另一個基矢量來點乘,以得到克羅內克爾記號。
The method to construct bvl is designed through judging the angle of sample and solution space 通過分析樣本矢量和解空間的夾角,推導了基矢量的判斷準則。