vault backup: 2026-03-06 21:19:59
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@@ -82,4 +82,11 @@ Definition: all possible _Subsets of A_
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$$
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A := {1, 2, 3} \
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cal(P)(A) = {emptyset, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}}
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$$
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$$
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## Relations
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| Relation | Explanation | Example |
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| ---------------- | --------------------------------------------------------------------------------------------------------------------- | ----------------------- |
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| *transitive*<br> | "chain reaction", a information about $a$ in relation to $c$ can be inferred from the relations $a -> b$ and $b -> c$ | $a < b, b < c => a < c$ |
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