Question: Let P = {An, n = 1, 2,...} be a partition of ( where An ( (, n 1, and let C be the

Let P = {An, n = 1, 2,...} be a partition of ( where An ( (, n ≥ 1, and let C be the class of all sums of members in P. Then show that C is the σ-field generated by the class P.

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