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## Homework Statement

None of the operators Lz, Ly and Lx commute. Show that [Lx,Ly] = i(h-cross)Lz

## Homework Equations

Where Lx is defined as Lx=-ih ( y delta/delta x - z delta/delta y)

Where Ly is defined as Ly=-ih ( z delta/delta x - x delta/delta z)

Where Lz is defined as Lz=-ih ( x delta/delta y - y delta/delta x)