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Related to power series: Taylor series
A sum of successively higher integral powers of a variable or combination of variables, each multiplied by a constant coefficient.
(Mathematics) a mathematical series whose terms contain ascending positive integral powers of a variable, such as a0 + a1x + a2x2 +…
Math. an infinite series in which the terms are coefficients times successive powers of a given variable, or times products of powers of two or more variables.