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[set-theory/en] add author, fix vowerls list

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Signed-off-by: Marcel Ribeiro-Dantas <mribeirodantas@seqera.io>
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Marcel Ribeiro-Dantas 2023-10-01 17:52:27 -03:00
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@ -2,7 +2,9 @@
category: Algorithms & Data Structures category: Algorithms & Data Structures
name: Set theory name: Set theory
contributors: contributors:
- ["Andrew Ryan Davis", "https://github.com/AndrewDavis1191"]
--- ---
Set theory is a branch of mathematics that studies sets, their operations, and their properties. Set theory is a branch of mathematics that studies sets, their operations, and their properties.
* A set is a collection of disjoint items. * A set is a collection of disjoint items.
@ -59,7 +61,7 @@ Long lists may be shortened with ellipses as long as the context is clear. For e
Set builder notation is a more descriptive way of constructing a set. It relies on a _subject_ and a _predicate_ such that `S = { subject : predicate }`. For example, Set builder notation is a more descriptive way of constructing a set. It relies on a _subject_ and a _predicate_ such that `S = { subject : predicate }`. For example,
``` ```
A = { x : x is a vowel } = { a, e, i, o, u, y} A = { x : x is a vowel } = { a, e, i, o, u }
B = { x : x ∈ N, x < 10 } = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 } B = { x : x ∈ N, x < 10 } = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }
C = { x : x = 2k, k ∈ N } = { 0, 2, 4, 6, 8, ... } C = { x : x = 2k, k ∈ N } = { 0, 2, 4, 6, 8, ... }
``` ```