Formal power series

Noun

Définitions

1.NounAny finite or infinite series of the form a 0 + a 1 x + a 2 x 2 ⋯ = ∑ i a i x i {\displaystyle \textstyle a_{0}+a_{1}x+a_{2}x^{2}\dots =\sum _{i}{a_{i}x^{i}}} , where the ai are numbers, but it is understood that no value is assigned to x.

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