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## Homework Statement

The red box only

## Homework Equations

## The Attempt at a Solution

I suppose we have to show

L_3 (Π_1) | E,m> = λ (Π_1) | E,m>

and

H (Π_1) | E,m> = μ (Π_1) | E,m>

And I guess there is something to do with the formula given? But they are in x_1 direction so what did they have to do with | E,m> ?

Any hints given will be much appreciated.

Thanks