# Wave function in an integral

1. Jan 10, 2010

### Cosmossos

Hello
I need to calculate <x> (x is the location of neutron) and the state is
and the integral is:
Can I move the x to be near the integral symbol? and how to I multiply the matrices?

And is this true:

Can I move the psi to be near the psi*? And psi*x psi =psi^2=1 right?

thanks

2. Jan 10, 2010

### Mentz114

The first vector under the integration should be a row, not a column as you've drawn it. $\bar{x}$ is a square matrix, so the full product is a scalar.

Last edited: Jan 10, 2010