When the factor to be cancelled is a base vector we dot-multiply by another base vector to produce a kronecker delta.
当要消去的因子是一个基矢量时,用另一个基矢量来点乘,以得到克罗内克尔记号。
When the factor to be cancelled is a base vector we dot-multiply by another base vector to produce a kronecker delta.
当要消去的因子是一个基矢量时,用另一个基矢量来点乘,以得到克罗内克尔记号。
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