dual number

短语

词形变化

dual numbers 复数 dual numbers

释义与例句

n.
  1. 1.

    A grammatical number denoting a quantity of exactly two.

    语言学
  2. 2.

    An element of an algebra (the algebra of dual numbers) which includes the real numbers and an element ε which satisfies ε ≠ 0 and ε² = 0.

    数学

    If f(x) is a polynomial or a power series then its derivative can be obtained “automatically” using dual numbers as follows: f'(x)#61;#123;f(x#43;#92;epsilon)-f(x)#92;over#92;epsilon#125; where f(x#43;#92;epsilon) should be expanded using the algebra of dual numbers. The role of the ε is therein similar to that of an infinitesimal.