"Version: 20181201"--Title page verso.Includes bibliographical references.1. Superposition principle -- 1.1. Green's function method -- 1.2. Fourier transform method -- 1.3. Problems2. Linear systems -- 2.1. Linearity -- 2.2. Shift invariance -- 2.3. Causality -- 2.4. Stability -- 2.5. Problems3. Spatial and temporal frequencies -- 3.1. Monochromatic plane waves -- 3.2. e-i([omega]t-k[product o…