Laplace Inversion and Initial-Value Problems — Cheat sheet

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Core rule

Solve for Y(s)Y(s) with the initial terms included, then match numerator and denominator to a transform pair.

Watch for

A shift in ss produces an exponential in time. A factor e−ase^{-as} produces a time delay instead; these are different transform rules. Repeated poles require terms for each power in partial fractions.