Quantum Mechanics Solution Manual 

© Leon van Dommelen 

2.2.2 Solution funcvecb
Question:
Graphically compare the spike diagram of the 10dimensional unit vector , with components (0,0,1,0,0,0,0,0,0,0), with the plot of the function 1. (No, they do not look alike.)
Answer:
The equivalent of a unit vector for functions is not the function 1, it is the Dirac delta function. This function will be discussed in detail later, but simply put, it is a single, infinitely high spike.