formal sum

名词 n.

英文释义

名词 n.
  1. An expression which looks like a sum but where the symbol + has a purely symbolic role, in the sense that the summands cannot be meaningfully combined.; An element of a free abelian group or vector space regarded as a sum of basis elements.
  2. An expression which looks like a sum but where the symbol + has a purely symbolic role, in the sense that the summands cannot be meaningfully combined.; A sum of an infinite sequence of numbers considered as an indeterminate object, in the sense of being subject to certain algebraic manipulations but not necessarily convergent.

词形变化

formal sums plural
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