| VTU NOTES | |
|---|---|
|
Subject code |
21MAT31 |
|
Semester |
3rd |
Laplace Transform Definition and Laplace transform of elementary functions (statements only). Problems on Laplace’sTransform of 𝑎𝑡𝑓(𝑡), 𝑡𝑛𝑓(𝑡) , đť‘“(𝑡) 𝑡 . Laplace transforms of Periodic functions (statement only) and unit-step function – problems. Inverse Laplace transforms definition and problems, Convolution theorem to find the inverse Laplace transforms (without Proof) problems. Laplace transforms derivatives, solutions of differential equations.
Fourier Series Introduction to infinite series, convergence and divergence. Periodic functions, Dirichlet’s condition. Fourier series of periodic functions with period 2𝜋 and arbitrary period. Half-range Fourier series. Practical harmonic analysis.
Infinite Fourier Transforms and Z-Transforms Infinite Fourier transforms definition, Fourier sine and cosine transforms. Inverse Fourier transforms, Inverse Fourier cosine and sine transforms. Problems. Difference equations, z-transform-definition, Standard z-transforms, Damping and shifting rules, and Problems. Inverse z-transform and applications to solve difference equations.
Numerical Solution of Partial Differential Equations Classifications of second-order partial differential equations, finite difference approximations to derivatives, Solution of Laplace’s equation using standard five-point formula. Solution of heat equation by Schmidt explicit formula and Crank- Nicholson method, Solution of the Wave equation. Problems. (8 Hours) Self Study: Solution of Poisson equations using standard five-point formula.
Numerical Solution of Second-Order ODEs and Calculus of Variations Second-order differential equations – Runge-Kutta method and Milne’s predictor and corrector method. (No derivations of formulae). Calculus of Variations:Functionals, Euler’s equation, Problems on extremals of functional. Geodesics on a plane,Variationalproblems