# Quantum Harmonic Oscillator Complete System

1. Jul 18, 2012

### YAHA

Over which interval do the wave functions of a harmonic oscillator form a complete and orthogonal system? Is it (-inf,+inf)? The case with particle in a box is rather clear(system is complete and orthogonal only for the interval of the well), however the harmonic oscillator is a bit less intuitive.

2. Jul 18, 2012