相加或相减的无穷小量进行等价替换的充分条件

吴昌健

Sufficient Conditions for Equivalent Substitution of Sums or Subtractions of Infinitesimal Variables

WU Chang-jian

工业技术创新 . 2019, (3): 91 -94 . DOI: 10.14103/j.issn.2095-8412.2019.03.018