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	<id>https://tetrationforum.org/hyperops_wiki/index.php?action=history&amp;feed=atom&amp;title=User%3ANatsugou</id>
	<title>User:Natsugou - Revision history</title>
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	<updated>2026-07-13T02:11:11Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://tetrationforum.org/hyperops_wiki/index.php?title=User:Natsugou&amp;diff=303&amp;oldid=prev</id>
		<title>Natsugou: Created page with &quot;This is Natsugou&#039;s personal page.  English works:  Negative rank hyperoperations (2023) https://googology.fandom.com/wiki/User_blog:Natsugoh/Negative_rank_hyperoperations  Sol...&quot;</title>
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		<updated>2026-06-26T20:39:02Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;This is Natsugou&amp;#039;s personal page.  English works:  Negative rank hyperoperations (2023) https://googology.fandom.com/wiki/User_blog:Natsugoh/Negative_rank_hyperoperations  Sol...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;This is Natsugou&amp;#039;s personal page.&lt;br /&gt;
&lt;br /&gt;
English works:&lt;br /&gt;
&lt;br /&gt;
Negative rank hyperoperations (2023)&lt;br /&gt;
https://googology.fandom.com/wiki/User_blog:Natsugoh/Negative_rank_hyperoperations&lt;br /&gt;
&lt;br /&gt;
Solving the functional equation a◦f = g◦a for f and for g (2024)&lt;br /&gt;
https://googology.fandom.com/wiki/User_blog:Natsugoh/Solving_the_functional_equation_a%E2%97%A6f_%3D_g%E2%97%A6a_for_f_and_for_g&lt;br /&gt;
&lt;br /&gt;
Discriminating whether a function of a real variable is an iterated function (2024)&lt;br /&gt;
https://googology.fandom.com/wiki/User_blog:Natsugoh/Discriminating_whether_a_function_of_a_real_variable_is_an_iterated_function&lt;br /&gt;
&lt;br /&gt;
A fee subgroup is not necessarily normal (2025)&lt;br /&gt;
https://googology.fandom.com/wiki/User_blog:Natsugoh/A_fee_subgroup_is_not_necessarily_normal&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Japanese works:&lt;br /&gt;
&lt;br /&gt;
ハイパー演算の整数拡張 (Negative rank hyperoperations) (2022)&lt;br /&gt;
https://googology.fandom.com/ja/wiki/%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%83%96%E3%83%AD%E3%82%B0:Natsugoh/%E3%83%8F%E3%82%A4%E3%83%91%E3%83%BC%E6%BC%94%E7%AE%97%E3%81%AE%E6%95%B4%E6%95%B0%E6%8B%A1%E5%BC%B5&lt;br /&gt;
&lt;br /&gt;
ハイパー演算の整数拡張 改訂 (Negative rank hyperoperations revision) (2023)&lt;br /&gt;
https://googology.fandom.com/ja/wiki/%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%83%96%E3%83%AD%E3%82%B0:Natsugoh/%E3%83%8F%E3%82%A4%E3%83%91%E3%83%BC%E6%BC%94%E7%AE%97%E3%81%AE%E6%95%B4%E6%95%B0%E6%8B%A1%E5%BC%B5_%E6%94%B9%E8%A8%82&lt;br /&gt;
&lt;br /&gt;
関数方程式a◦g=f◦aをfについて, およびgについて解く (Solving the functional equation a◦f = g◦a for f and for g) (2024)&lt;br /&gt;
https://googology.fandom.com/ja/wiki/%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%83%96%E3%83%AD%E3%82%B0:Natsugoh/%E9%96%A2%E6%95%B0%E6%96%B9%E7%A8%8B%E5%BC%8Fa%E2%97%A6g%3Df%E2%97%A6a%E3%82%92f%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6,_%E3%81%8A%E3%82%88%E3%81%B3g%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E8%A7%A3%E3%81%8F&lt;br /&gt;
&lt;br /&gt;
実変数関数を写像の反復か否か判定 (Discriminating whether a function of a real variable is an iterated function) (2024)&lt;br /&gt;
https://googology.fandom.com/ja/wiki/%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%83%96%E3%83%AD%E3%82%B0:Natsugoh/%E5%AE%9F%E5%A4%89%E6%95%B0%E9%96%A2%E6%95%B0%E3%82%92%E5%86%99%E5%83%8F%E3%81%AE%E5%8F%8D%E5%BE%A9%E3%81%8B%E5%90%A6%E3%81%8B%E5%88%A4%E5%AE%9A&lt;br /&gt;
&lt;br /&gt;
フィーは必ずしも正規でない (A fee subgroup is not necessarily normal) (2025)&lt;br /&gt;
https://googology.fandom.com/ja/wiki/%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC%E3%83%96%E3%83%AD%E3%82%B0:Natsugoh/%E3%83%95%E3%82%A3%E3%83%BC%E3%81%AF%E5%BF%85%E3%81%9A%E3%81%97%E3%82%82%E6%AD%A3%E8%A6%8F%E3%81%A7%E3%81%AA%E3%81%84&lt;br /&gt;
&lt;br /&gt;
可換な全順序群の全ての正元からなる半群(正錐)からの準同型の分類 (work in progress)&lt;br /&gt;
https://drive.google.com/file/d/1PQfcqGvQKIRt8EXaWAsIrPjM2A9UJTmX/view?usp=sharing&lt;/div&gt;</summary>
		<author><name>Natsugou</name></author>
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