Rational number can approximate to real number, use the notation of approximate one can prove Riemann function isn t differentiable anywhere, that the Rational points are dense in unit circle.
Therefore it is possible to simply regard the value of the induction on unit length in the near middle of two "infinite length" parallel conductor as its approximate value.
故可简单的计算中部附近单位长度上自感作为“无限长”平行导体回路单位长度自感的近似值。
3
Under the framework of partition of unit (PU) in the method, enrichment cover functions with the known analyzed information were defined, and the formulation of approximate field function was built.