Category:Examples of Cardinals
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This category contains examples of Cardinal.
Let $S$ be a set.
Associated with $S$ there exists a set $\map \Card S$ called the cardinal of $S$.
It has the properties:
- $(1): \quad \map \Card S \sim S$
that is, $\map \Card S$ is (set) equivalent to $S$
- $(2): \quad S \sim T \iff \map \Card S = \map \Card T$
Subcategories
This category has only the following subcategory.