(statistics) A set of data points, each of which represents the value of the same variable at different times, normally at uniform intervals.

(mathematics) An infinite series whose partial sums are divergent

(mathematical analysis) An infinite series whose partial sums converge

(mathematical analysis) Any expression that represents the addition a countably infinite number of ordered summands, often explicitly indexed by the positive or nonnegative integers.

(chemistry) A list of the metals in order of their electronegativity (and hence their reactivity).

(informal, physics) The triboelectric series

(physics) A list of materials, showing which are more or less prone to acquire a positive or negative electric charge when rubbed.

(mathematics) Any power series such that the ratio of the (k+1)-th and the k-th terms is a rational function of the natural integer k.

(mathematics, mathematical analysis) Any series resulting from the decomposition of a periodic function into terms involving cosines and sines (or, equivalently, complex exponentials).

(physics) The set of spectral lines of the hydrogen atom that correspond to transitions involving a principal quantum number n=2