Fourier series reveal how complex periodic signals can be rebuilt from simple sine and cosine waves. Learn how harmonics, Fourier coefficients, orthogonality, partial sums, and frequency-domain thinking connect to sound, heat flow, PDEs, engineering, and quantum mechanics.
Chaos Theory explained through the Butterfly Effect, Lorenz System, Lyapunov Exponents, Strange Attractors, and nonlinear dynamics. Learn why deterministic equations can still produce unpredictable behavior.
