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## Homework Statement

For a free particle moving in one dimension, divide the following set of operators into subsets of commuting operators:

[

**P**,

**x**,

**H**,

**p**]

## Homework Equations

## The Attempt at a Solution

I don't get the statement itself

What does the set represents for the particle ?

Dividing into subsets is like finding the operators that commute in the set ?

Thanks