MacBookPro.lan 2026-6-17:19:47:47
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"prevs"
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],
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"lock_view": false,
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"lock_path": "filtre convergent.md",
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"lock_path": "cardinal.md",
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"custom_sort_fields": false,
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"custom_sort_field_labels": []
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},
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@@ -0,0 +1,17 @@
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---
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up:
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- "[[théorie des ensemble NBC]]"
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tags:
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- s/maths/logique
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aliases:
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---
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> [!definition] Définition
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> On définit les cardinaux à partir des ensembles :
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> $0 = \emptyset$
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> $1 = \{ \emptyset \}$
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> $2 = \{ \emptyset, \{ \emptyset \} \}$
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> $3 = \{ \emptyset, \{ \emptyset \}, \{ \emptyset, \{ \emptyset \} \} \}$
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> $\vdots$
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> $n^{+} = n \cup \{ n \}$
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^definition
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