Category:Special Sets

This category contains results about Special Sets.
Definitions specific to this category can be found in Definitions/Special Sets.

Let $S$ and $x$ be sets.

We say that:

$S$ is special for $x$ (with respect to $g$)

if and only if:

$(1)$	$:$	$\O \in S$
$(2)$	$:$	$S$ is closed under $g$ relative to $x$
$(3)$	$:$	$S$ is closed under chain unions

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