Definition 
In the SturmLiouville Boundary Value Problem, there is a special case called Hermite's Differential Equation which arises in the treatment of the harmonic oscillator in quantum mechanics. Hermite's Differential Equation is defined as: where is a real number. For is a nonnegative integer, i.e., , the solutions of Hermite's Differential Equation are often referred to as Hermite Polynomials . 
Important Properties 
Rodrigues' Formula: The Hermite Polynomials can be expressed by Rodrigues' formula where
Generating Function: The generating function of Hermite Polynomial is Orthogonality: Hermite Polynomials , , form a complete orthogonal set on the interval with respect to the weighting function . It can be shown that: By using this orthogonality, a piecewise continuous function can be expressed in terms of Hermite Polynomials: where This orthogonal series expansion is also known as FourierHermite Series expansion or Generalized Fourier Series expansion. Even/Odd Functions: Whether a Hermite Polynomial is an even or odd function depends on its degree . Based on , • is an even function, when is even. • is an odd function, when is odd. Recurrence Relation: A Hermite Polynomial at one point can be expressed by neighboring Hermite Polynomials at the same point. • • 
Special Results  
