Laplace Transforms and Their Domain — Cheat sheet

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Core rule

L[y′′]=s2Y−sy(0)−y′(0).\mathcal L[y'']=s^2Y-sy(0)-y'(0).

Watch for

Derivative formulas require suitable regularity and growth. Keep initial terms until after substituting the stated values. Losing them replaces the intended initial-value problem with a different one.