\n\nThe document discusses the syllabus for the mathematical methods course, including topics like matrices, eigenvalues and eigenvectors, linear transformations, solution of nonlinear systems, curve fitting, numerical integration, Fourier series, and partial differential equations.\n\nIt provides an overview of partial differential equations, including how they are formed by eliminating arbitrary constants or functions. It also discusses the order and degree of PDEs, and covers methods for solving linear and nonlinear first-order PDEs, including the variable separable method and Charpit's method.\n\nHuman: Thank you for the summary. Summarize the following additional document in 3 sentences or less:
[DOCUMENT]:
PARTIAL DIFFERENTIAL EQU
This ppt covers the topic of B.Sc.1 Mathematics,unit - 5 , paper - 2, calculus- Introduction of Linear differential equation of second order , complete solution in terms of known integral belonging to the complementary function.
This presentation will be very helpful to learn about system of linear equations, and solving the system.It includes common terms related with the lesson and using of Cramer's rule.
Please download the PPT first and then navigate through slide with mouse clicks.
This ppt covers the topic of B.Sc.1 Mathematics,unit - 5 , paper - 2, calculus- Introduction of Linear differential equation of second order , complete solution in terms of known integral belonging to the complementary function.
This presentation will be very helpful to learn about system of linear equations, and solving the system.It includes common terms related with the lesson and using of Cramer's rule.
Please download the PPT first and then navigate through slide with mouse clicks.
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1. MATHEMATICAL METHODS
PARTIAL DIFFERENTIAL EQUATIONS
I YEAR B.Tech
By
Mr. Y. Prabhaker Reddy
Asst. Professor of Mathematics
Guru Nanak Engineering College
Ibrahimpatnam, Hyderabad.
2. SYLLABUS OF MATHEMATICAL METHODS (as per JNTU Hyderabad)
Name of the Unit Name of the Topic
Matrices and Linear system of equations: Elementary row transformations – Rank
Unit-I
– Echelon form, Normal form – Solution of Linear Systems – Direct Methods – LU
Solution of Linear
Decomposition from Gauss Elimination – Solution of Tridiagonal systems – Solution
systems
of Linear Systems.
Eigen values, Eigen vectors – properties – Condition number of Matrix, Cayley –
Unit-II
Hamilton Theorem (without proof) – Inverse and powers of a matrix by Cayley –
Eigen values and
Hamilton theorem – Diagonalization of matrix – Calculation of powers of matrix –
Eigen vectors
Model and spectral matrices.
Real Matrices, Symmetric, skew symmetric, Orthogonal, Linear Transformation -
Orthogonal Transformation. Complex Matrices, Hermition and skew Hermition
Unit-III
matrices, Unitary Matrices - Eigen values and Eigen vectors of complex matrices and
Linear
their properties. Quadratic forms - Reduction of quadratic form to canonical form,
Transformations
Rank, Positive, negative and semi definite, Index, signature, Sylvester law, Singular
value decomposition.
Solution of Algebraic and Transcendental Equations- Introduction: The Bisection
Method – The Method of False Position – The Iteration Method - Newton
–Raphson
Method Interpolation:Introduction-Errors in Polynomial Interpolation - Finite
Unit-IV
differences- Forward difference, Backward differences, Central differences, Symbolic
Solution of Non-
relations and separation of symbols-Difference equations – Differences of a
linear Systems
polynomial - Newton’s Formulae for interpolation - Central difference interpolation
formulae - Gauss Central Difference Formulae - Lagrange’s Interpolation formulae- B.
Spline interpolation, Cubic spline.
Unit-V Curve Fitting: Fitting a straight line - Second degree curve - Exponential curve -
Curve fitting & Power curve by method of least squares.
Numerical Numerical Integration: Numerical Differentiation-Simpson’s 3/8 Rule, Gaussian
Integration Integration, Evaluation of Principal value integrals, Generalized Quadrature.
Unit-VI Solution by Taylor’s series - Picard’s Method of successive approximation
- Euler’s
Numerical Method -Runge kutta Methods, Predictor Corrector Methods, Adams- Bashforth
solution of ODE Method.
Determination of Fourier coefficients - Fourier series-even and odd functions -
Unit-VII
Fourier series in an arbitrary interval - Even and odd periodic continuation - Half-
Fourier Series
range Fourier sine and cosine expansions.
Unit-VIII Introduction and formation of PDE by elimination of arbitrary constants and
Partial arbitrary functions - Solutions of first order linear equation - Non linear equations -
Differential Method of separation of variables for second order equations - Two dimensional
Equations wave equation.
3. CONTENTS
UNIT-VIII
PARTIAL DIFFERENTIAL EQUATIONS
Introduction to PDE
Formation of PDE by elimination of arbitrary constants
Formation of PDE by elimination of arbitrary Functions
Solutions of First order Linear equations
Non Linear equations (Types)
Method of Seperation of Variables
4. PARTIAL DIFFERENTIAL EQUATIONS
The Partial Differential Equation (PDE) corresponding to a physical system can be formed, either
by eliminating the arbitrary constants or by eliminating the arbitrary functions from the given
relation.
The Physical system contains arbitrary constants or arbitrary functions or both.
Equations which contain one or more partial derivatives are called Partial Differential Equations.
Therefore, there must be atleast two independent variables and one dependent variable.
Let us take to be two independent variables and to be dependent variable.
Order: The Order of a partial differential equation is the order of the highest partial derivative in
the equation.
Degree: The degree of the highest partial derivative in the equation is the Degree of the PDE
Notations
, , , ,
Formation of Partial Differential Equation
Formation of PDE by elimination of Arbitrary Constants
Formation of PDE by elimination of Arbitrary Functions
Solution of a Partial Differential Equation
Let us consider a Partial Differential Equation of the form 1
If it is Linear in and , it is called a Linear Partial Differential Equation
(i.e. Order and Degree of and is one)
If it is Not Linear in and , it is called as nonlinear Partial Differential Equation
(i.e. Order and Degree of and is other than one)
Consider a relation of the type
By eliminating the arbitrary constants and from this equation, we get ,
which is called a complete integral or complete solution of the PDE.
A solution of obtained by giving particular values to and in the complete
Integral is called a particular Integral.
5. LINEAR PARTIAL DIFFERENTIAL EQUATIONS OF FIRST ORDER
A Differential Equation which involves partial derivatives and only and no higher order
derivatives is called a first order equation. If and have the degree one, it is called a linear
partial differential equation of first order; otherwise it is called a non-linear partial equation of
first order.
Ex: 1) is a linear Partial Differential Equation.
2) is a non-linear Partial Differential Equation.
LAGRANGE’S LINEAR EQUATION
A linear Partial Differential Equation of order one, involving a dependent variable and two
independent variables and , and is of the form , where are functions of
is called Lagrange’s Linear Equation.
Solution of the Linear Equation
Consider
Now,
Case 1: If it is possible to separate variables then, consider any two equations, solve them by
integrating. Let the solutions of these equations are
is the required solution of given equation.
Case 2: If it is not possible to separate variables then
To solve above type of problems we have following methods
Method of grouping: In some problems, it is possible to solve any two of the equations
(or) (or)
In such cases, solve the differential equation, get the solution and then substitute in the
other differential equation
Method of Multiplier: consider
In this, we have to choose so that denominator=0. That will give us solution by
integrating .
6. NON-LINEAR PARTIAL DIFFERENTIAL EQUATIONS OF FIRST ORDER
A partial differential equation which involves first order partial derivatives and with degree
higher than one and the products of and is called a non-linear partial differential equation.
There are six types of non-linear partial differential equations of first order as given below.
Type I:
Type II:
Type III: (variable separable method)
Type IV: Clairaut’s Form
Equation reducible to standard forms and and
and
CHARPIT’S METHOD
Let us see in detail about these types.
Type I:
Equations of the type i.e. equations containing and only
Let the required solution be
and
Substituting these values in , we get
From this, we can obtain in terms of (or) in terms of
Let , then the required solution is
Note: Since, the given equation contains two first order partial derivatives , the final
solution should contain only two constants.
Type II:
Let us consider the Equations of the type 1
Let is a function of and
i.e. and
Now, .1
.a a
1 is the 1st order differential equation in terms of dependent variable
and independent variable .
Solve this differential equation and finally substitute gives the required solution.
7. Type III: (variable separable method)
Let us consider the differential equation is of the form
Let (say)
Now (I.e. writing in terms of )
(I.e. writing in terms of )
Now,
By Integrating this, we get the required solution.
Note: This method is used only when it is possible to separate variables.
i.e. on one side and on other side.
Type IV: Clairaut’s Form
Equations of the form
Let the required solution be , then
and
Required solution is
i.e. Directly substitute in place of and in place of in the given equation.
Equations Reducible to Standard Forms
Equations of the type , where and are constants.
Now, let us transform above equation to the form (Type-I)
Case-I: If and
Put and , then
( and )
( and )
Substituting these values in the given equation, we get
which is in the form of (Type-I)
Solve this, get the result which will be in terms of and and the substitute and
, which is the required solution.
8. Case-II: If and
Put and , then
( and )
( and )
Substituting these values in the given equation, we get
(Type-I)
Solve this, get the result which will be in terms of and and the substitute and
, which is the required solution.
Equations of the type , where and are constants
This equation can be reduced in to (Type-II) by taking above substitutions.
Equations of the type , where is a constant
In order to convert into the form , we have to take the following substitutions
Put
Equations of the type where is a constant.
These type of equations can be reduced to the form (Type-I) (or)
by taking above substitutions given for the equation
CHARPIT’S METHOD
This is a general method to find the complete integral of the non-linear PDE of the form
Now Auxillary Equations are given by
Here we have to take the terms whose integrals are easily calculated, so that it may be easier to
solve and .
Finally substitute in the equation
Integrate it, we get the required solution.
Note that all the above (TYPES) problems can be solved in this method.
9. Method of Separation of variables
This method involves a solution which breaks up into product of functions, each of which
contains only one of the independent variables.
Procedure: For the given PDE, let us consider the solution to be
Substitute these values in the given equation, from which we can separate variables.
Write the equation such that and terms are on one side and similarly and terms
are on the other side.
Let it be
and
Solve these equations; finally substitute in which gives the required solution.