Complete Factorizations of Proper Element in Principal Ideal Domain are Equivalent

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Theorem

Let $\struct {D, +, \circ}$ be a principal ideal domain.

Let $x \in D$ be a proper element of $D$.

Let there be two complete factorizations of $x$:

$x = u_y \circ y_1 \circ y_2 \circ \cdots \circ y_m = F_1$
$x = u_z \circ z_1 \circ z_2 \circ \cdots \circ z_n = F_2$


Then $F_1$ and $F_2$ are equivalent.


Proof

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