Category:G-Tower is Well-Ordered under Subset Relation

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This category contains pages concerning G-Tower is Well-Ordered under Subset Relation:


Let $M$ be a class.

Let $g: M \to M$ be a progressing mapping on $M$.

Let $M$ be a $g$-tower.


Then $M$ is well-ordered under the subset relation such that:

\((1)\)   $:$   Smallest Element:    $\O$ is the smallest element of $M$      
\((2)\)   $:$   Immediate Successor:    the immediate successor of $x$ (if there is one) is $\map g x$      
\((3)\)   $:$   Limit Element:    every limit element is the union of its set of predecessors.