CONTENTS :- 1. SOLUTION OF LINEAR DIFFERENTIAL EQUATIONS OF SECOND ORDER WITH VARIABLE COEFFICIENTS 2. SERIES SOLUTIONS OF DIFFERENTIAL EQUATIONS LEGENDRE’S FUNCTIONS AND BESSELS’ FUNCTIONS 3. AN INTRODUCTION TO PARTIAL DIFFERENTIAL EQUATIONS 4. SOME METHODS FOR THE SOLUTION OF PARTIAL DIFFERENTIAL EQUATIONS 5. PARTIAL DIFFERENTIAL EQUATIONS OF SECOND ORDER 6. PARTIAL DIFFERENTIAL EQUATION OF SECOND ORDER WITH CONSTANT COEFFICIENTS 7. PARTIAL DIFFERENTIAL EQUATIONS OF SECOND ORDER WITH VARIABLE COEFFICIENT