<?xml version="1.0"?>
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	<id>https://junhoahn.kr/junyoung/index.php?action=history&amp;feed=atom&amp;title=Natural_Numbers</id>
	<title>Natural Numbers - 편집 역사</title>
	<link rel="self" type="application/atom+xml" href="https://junhoahn.kr/junyoung/index.php?action=history&amp;feed=atom&amp;title=Natural_Numbers"/>
	<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;action=history"/>
	<updated>2026-04-29T18:46:40Z</updated>
	<subtitle>이 문서의 편집 역사</subtitle>
	<generator>MediaWiki 1.43.0</generator>
	<entry>
		<id>https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3700&amp;oldid=prev</id>
		<title>Pinkgo: /* Definition of Natural Numbers */</title>
		<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3700&amp;oldid=prev"/>
		<updated>2025-10-08T09:01:56Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Definition of Natural Numbers&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;ko&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← 이전 판&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;2025년 10월 8일 (수) 09:01 판&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l11&quot;&gt;11번째 줄:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;11번째 줄:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;1 = \{\empty\} = \{0\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;1 = \{\empty\} = \{0\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;,3&lt;/del&gt;\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;즉 자연수 n은 그보다 작은 모든 수의 집합으로 정의된다. 이는 [[Sets#Finite and Infinite Set|후자 집합]]을 이용하여 다음과 같이 나타낼 수 있다.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;즉 자연수 n은 그보다 작은 모든 수의 집합으로 정의된다. 이는 [[Sets#Finite and Infinite Set|후자 집합]]을 이용하여 다음과 같이 나타낼 수 있다.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(X)=X\cup\{X\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(X)=X\cup\{X\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key jy_wiki:diff:1.41:old-3699:rev-3700:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Pinkgo</name></author>
	</entry>
	<entry>
		<id>https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3699&amp;oldid=prev</id>
		<title>Pinkgo: /* Definition of Natural Numbers */</title>
		<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3699&amp;oldid=prev"/>
		<updated>2025-10-08T09:01:31Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Definition of Natural Numbers&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;ko&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← 이전 판&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;2025년 10월 8일 (수) 09:01 판&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l9&quot;&gt;9번째 줄:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;9번째 줄:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;자연수는 아래와 같이 집합으로 표현할 수 있다:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;자연수는 아래와 같이 집합으로 표현할 수 있다:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;0 = \empty = \{\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;0 = \empty = \{\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;1 = \{\empty\} = {0}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;1 = \{\empty\} = &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;\&lt;/ins&gt;{0&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;\&lt;/ins&gt;}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2,3\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2,3\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Pinkgo</name></author>
	</entry>
	<entry>
		<id>https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3303&amp;oldid=prev</id>
		<title>Pinkgo: /* Definition of Natural Numbers */</title>
		<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3303&amp;oldid=prev"/>
		<updated>2025-09-09T16:47:10Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Definition of Natural Numbers&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;ko&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← 이전 판&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;2025년 9월 9일 (화) 16:47 판&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l17&quot;&gt;17번째 줄:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;17번째 줄:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(1) = \{0,1\} = 2&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(1) = \{0,1\} = 2&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(2) = \{0,1,2\} = 3&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(2) = \{0,1,2\} = 3&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;이를 통해 [[Sets#&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Infinity &lt;/del&gt;Set|Infinity Set]]에 대한 정의를 이용해 자연수 집합 &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;을 정의할 수 있다. 이는 아래와 같다:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;이를 통해 [[Sets#&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Finite and Infinite &lt;/ins&gt;Set|Infinity Set]]에 대한 정의를 이용해 자연수 집합 &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;을 정의할 수 있다. 이는 아래와 같다:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;은 위에서 설명한 성질을 만족하는 집합들 중에서 가장 작은 집합(부분집합 관계로 최소인 집합)이다.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;은 위에서 설명한 성질을 만족하는 집합들 중에서 가장 작은 집합(부분집합 관계로 최소인 집합)이다.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==각주==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==각주==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Pinkgo</name></author>
	</entry>
	<entry>
		<id>https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3302&amp;oldid=prev</id>
		<title>Pinkgo: /* Definition of Natural Numbers */</title>
		<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3302&amp;oldid=prev"/>
		<updated>2025-09-09T16:47:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Definition of Natural Numbers&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← 이전 판&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;2025년 9월 9일 (화) 16:47 판&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l12&quot;&gt;12번째 줄:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;12번째 줄:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2,3\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2,3\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;즉 자연수 n은 그보다 작은 모든 수의 집합으로 정의된다. 이는 [[Sets#&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Infinity &lt;/del&gt;Set|후자 집합]]을 이용하여 다음과 같이 나타낼 수 있다.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;즉 자연수 n은 그보다 작은 모든 수의 집합으로 정의된다. 이는 [[Sets#&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Finite and Infinite &lt;/ins&gt;Set|후자 집합]]을 이용하여 다음과 같이 나타낼 수 있다.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(X)=X\cup\{X\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(X)=X\cup\{X\}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(0) = \{0\} = 1&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &amp;lt;math&amp;gt;S(0) = \{0\} = 1&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Pinkgo</name></author>
	</entry>
	<entry>
		<id>https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3297&amp;oldid=prev</id>
		<title>Pinkgo: 새 문서: 분류:계산 이론 개론 분류:컴퓨터 공학 상위 문서: 계산 이론 개론  ==개요== 해당 문서에서는 자연수를 집합 이론을 통해 정의하는 방법을 설명한다.  ==Definition of Natural Numbers== 자연수는 아래와 같이 집합으로 표현할 수 있다:  &lt;math&gt;0 = \empty = \{\}&lt;/math&gt;  &lt;math&gt;1 = \{\empty\} = {0}&lt;/math&gt;  &lt;math&gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&lt;/math&gt;  &lt;math&gt;3 = \{\e...</title>
		<link rel="alternate" type="text/html" href="https://junhoahn.kr/junyoung/index.php?title=Natural_Numbers&amp;diff=3297&amp;oldid=prev"/>
		<updated>2025-09-09T16:09:28Z</updated>

		<summary type="html">&lt;p&gt;새 문서: &lt;a href=&quot;/junyoung/index.php?title=%EB%B6%84%EB%A5%98:%EA%B3%84%EC%82%B0_%EC%9D%B4%EB%A1%A0_%EA%B0%9C%EB%A1%A0&quot; title=&quot;분류:계산 이론 개론&quot;&gt;분류:계산 이론 개론&lt;/a&gt; &lt;a href=&quot;/junyoung/index.php?title=%EB%B6%84%EB%A5%98:%EC%BB%B4%ED%93%A8%ED%84%B0_%EA%B3%B5%ED%95%99&quot; title=&quot;분류:컴퓨터 공학&quot;&gt;분류:컴퓨터 공학&lt;/a&gt; 상위 문서: &lt;a href=&quot;/junyoung/index.php?title=%EA%B3%84%EC%82%B0_%EC%9D%B4%EB%A1%A0_%EA%B0%9C%EB%A1%A0#Mathematical_Objects&quot; title=&quot;계산 이론 개론&quot;&gt;계산 이론 개론&lt;/a&gt;  ==개요== 해당 문서에서는 자연수를 집합 이론을 통해 정의하는 방법을 설명한다.  ==Definition of Natural Numbers== 자연수는 아래와 같이 집합으로 표현할 수 있다:  &amp;lt;math&amp;gt;0 = \empty = \{\}&amp;lt;/math&amp;gt;  &amp;lt;math&amp;gt;1 = \{\empty\} = {0}&amp;lt;/math&amp;gt;  &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;  &amp;lt;math&amp;gt;3 = \{\e...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;새 문서&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[분류:계산 이론 개론]]&lt;br /&gt;
[[분류:컴퓨터 공학]]&lt;br /&gt;
상위 문서: [[계산 이론 개론#Mathematical Objects|계산 이론 개론]]&lt;br /&gt;
&lt;br /&gt;
==개요==&lt;br /&gt;
해당 문서에서는 자연수를 집합 이론을 통해 정의하는 방법을 설명한다.&lt;br /&gt;
&lt;br /&gt;
==Definition of Natural Numbers==&lt;br /&gt;
자연수는 아래와 같이 집합으로 표현할 수 있다:&lt;br /&gt;
 &amp;lt;math&amp;gt;0 = \empty = \{\}&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;1 = \{\empty\} = {0}&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;2 = \{\empty,\{\empty\}\} = \{0,1\}&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;3 = \{\empty, \{\empty\}, \{ \empty, \{\empty\}\}\} = \{1,2,3\}&amp;lt;/math&amp;gt;&lt;br /&gt;
즉 자연수 n은 그보다 작은 모든 수의 집합으로 정의된다. 이는 [[Sets#Infinity Set|후자 집합]]을 이용하여 다음과 같이 나타낼 수 있다.&lt;br /&gt;
 &amp;lt;math&amp;gt;S(X)=X\cup\{X\}&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;S(0) = \{0\} = 1&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;S(1) = \{0,1\} = 2&amp;lt;/math&amp;gt;&lt;br /&gt;
 &amp;lt;math&amp;gt;S(2) = \{0,1,2\} = 3&amp;lt;/math&amp;gt;&lt;br /&gt;
이를 통해 [[Sets#Infinity Set|Infinity Set]]에 대한 정의를 이용해 자연수 집합 &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;을 정의할 수 있다. 이는 아래와 같다:&lt;br /&gt;
 &amp;lt;math&amp;gt;\mathbb{N}&amp;lt;/math&amp;gt;은 위에서 설명한 성질을 만족하는 집합들 중에서 가장 작은 집합(부분집합 관계로 최소인 집합)이다.&lt;br /&gt;
&lt;br /&gt;
==각주==&lt;/div&gt;</summary>
		<author><name>Pinkgo</name></author>
	</entry>
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