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	<updated>2026-05-01T13:43:22Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.vistrails.org//index.php?title=Template:LSU_CT99CommonTheme1Awhite&amp;diff=16172&amp;oldid=prev</id>
		<title>Tohline at 22:59, 10 August 2018</title>
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		<updated>2018-08-10T22:59:11Z</updated>

		<summary type="html">&lt;p&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;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:59, 10 August 2018&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-l3&quot;&gt;Line 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 3:&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;tr&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;tr&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;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot;&amp;gt;&amp;lt;font color=&amp;quot;#770000&amp;quot;&amp;gt;'''Gravitational Potential in the Thin Ring (TR) Approximation'''&amp;lt;/font&amp;gt;&amp;lt;/td&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;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot;&amp;gt;&amp;lt;font color=&amp;quot;#770000&amp;quot;&amp;gt;'''Gravitational Potential in the Thin Ring (TR) Approximation'''&amp;lt;/font&amp;gt;&amp;lt;/td&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;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot; rowspan=&amp;quot;2&amp;quot;&amp;gt;[[File:FlatColorContoursCropped.png|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;225px&lt;/del&gt;|Contours for Thin Ring Approximation]]&amp;lt;/td&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;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot; rowspan=&amp;quot;2&amp;quot;&amp;gt;[[File:FlatColorContoursCropped.png|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;220px&lt;/ins&gt;|Contours for Thin Ring Approximation]]&amp;lt;/td&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;/tr&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;/tr&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;tr&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;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Tohline</name></author>
	</entry>
	<entry>
		<id>https://www.vistrails.org//index.php?title=Template:LSU_CT99CommonTheme1Awhite&amp;diff=16171&amp;oldid=prev</id>
		<title>Tohline at 22:57, 10 August 2018</title>
		<link rel="alternate" type="text/html" href="https://www.vistrails.org//index.php?title=Template:LSU_CT99CommonTheme1Awhite&amp;diff=16171&amp;oldid=prev"/>
		<updated>2018-08-10T22:57:51Z</updated>

		<summary type="html">&lt;p&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;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:57, 10 August 2018&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-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&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;In &amp;amp;sect;102 of a book titled, [https://www.amazon.com/Theory-Potential-W-D-Macmillan/dp/0486604861/ref=sr_1_2?s=books&amp;amp;ie=UTF8&amp;amp;qid=1503444466&amp;amp;sr=1-2&amp;amp;keywords=the+theory+of+the+potential ''The Theory of the Potential'', MacMillan (1958; originally, 1930)] derives an analytic expression for the gravitational potential of a uniform, infinitesimally thin, circular &amp;quot;hoop&amp;quot; of radius, &amp;lt;math&amp;gt;~a&amp;lt;/math&amp;gt;.  Throughout our related discussions, we generally will refer to this additional Key Equation from MacMillan as providing an expression for the,&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;In &amp;amp;sect;102 of a book titled, [https://www.amazon.com/Theory-Potential-W-D-Macmillan/dp/0486604861/ref=sr_1_2?s=books&amp;amp;ie=UTF8&amp;amp;qid=1503444466&amp;amp;sr=1-2&amp;amp;keywords=the+theory+of+the+potential ''The Theory of the Potential'', MacMillan (1958; originally, 1930)] derives an analytic expression for the gravitational potential of a uniform, infinitesimally thin, circular &amp;quot;hoop&amp;quot; of radius, &amp;lt;math&amp;gt;~a&amp;lt;/math&amp;gt;.  Throughout our related discussions, we generally will refer to this additional Key Equation from MacMillan as providing an expression for the,&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;table border=&amp;quot;0&amp;quot; cellpadding=&amp;quot;5&amp;quot; align=&amp;quot;center&amp;quot;&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;table border=&amp;quot;0&amp;quot; cellpadding=&amp;quot;5&amp;quot; align=&amp;quot;center&amp;quot;&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;tr&amp;gt;&amp;lt;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot;&amp;gt;&amp;lt;font color=&amp;quot;#770000&amp;quot;&amp;gt;'''Gravitational Potential in the Thin Ring (TR) Approximation'''&amp;lt;/font&amp;gt;&amp;lt;/td&amp;gt;&amp;lt;/tr&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;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&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;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot;&amp;gt;&amp;lt;font color=&amp;quot;#770000&amp;quot;&amp;gt;'''Gravitational Potential in the Thin Ring (TR) Approximation'''&amp;lt;/font&amp;gt;&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot; rowspan=&amp;quot;2&amp;quot;&amp;gt;[[File:FlatColorContoursCropped.png|225px|Contours for Thin Ring Approximation]]&amp;lt;/td&amp;gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&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;/tr&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;tr&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;tr&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;td align=&amp;quot;center&amp;quot;&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;td align=&amp;quot;center&amp;quot;&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Tohline</name></author>
	</entry>
	<entry>
		<id>https://www.vistrails.org//index.php?title=Template:LSU_CT99CommonTheme1Awhite&amp;diff=16148&amp;oldid=prev</id>
		<title>Tohline: Created page with 'In &amp;sect;102 of a book titled, [https://www.amazon.com/Theory-Potential-W-D-Macmillan/dp/0486604861/ref=sr_1_2?s=books&amp;ie=UTF8&amp;qid=1503444466&amp;sr=1-2&amp;keywords=the+theory+of+the+po…'</title>
		<link rel="alternate" type="text/html" href="https://www.vistrails.org//index.php?title=Template:LSU_CT99CommonTheme1Awhite&amp;diff=16148&amp;oldid=prev"/>
		<updated>2018-08-10T22:05:52Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;#039;In §102 of a book titled, [https://www.amazon.com/Theory-Potential-W-D-Macmillan/dp/0486604861/ref=sr_1_2?s=books&amp;amp;ie=UTF8&amp;amp;qid=1503444466&amp;amp;sr=1-2&amp;amp;keywords=the+theory+of+the+po…&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;In &amp;amp;sect;102 of a book titled, [https://www.amazon.com/Theory-Potential-W-D-Macmillan/dp/0486604861/ref=sr_1_2?s=books&amp;amp;ie=UTF8&amp;amp;qid=1503444466&amp;amp;sr=1-2&amp;amp;keywords=the+theory+of+the+potential ''The Theory of the Potential'', MacMillan (1958; originally, 1930)] derives an analytic expression for the gravitational potential of a uniform, infinitesimally thin, circular &amp;quot;hoop&amp;quot; of radius, &amp;lt;math&amp;gt;~a&amp;lt;/math&amp;gt;.  Throughout our related discussions, we generally will refer to this additional Key Equation from MacMillan as providing an expression for the,&lt;br /&gt;
&amp;lt;table border=&amp;quot;0&amp;quot; cellpadding=&amp;quot;5&amp;quot; align=&amp;quot;center&amp;quot;&amp;gt;&lt;br /&gt;
&amp;lt;tr&amp;gt;&amp;lt;td align=&amp;quot;center&amp;quot; colspan=&amp;quot;1&amp;quot;&amp;gt;&amp;lt;font color=&amp;quot;#770000&amp;quot;&amp;gt;'''Gravitational Potential in the Thin Ring (TR) Approximation'''&amp;lt;/font&amp;gt;&amp;lt;/td&amp;gt;&amp;lt;/tr&amp;gt;&lt;br /&gt;
&amp;lt;tr&amp;gt;&lt;br /&gt;
  &amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&lt;br /&gt;
{{ User:Tohline/Math/EQ TRApproximation }}&lt;br /&gt;
  &amp;lt;/td&amp;gt;&lt;br /&gt;
&amp;lt;/tr&amp;gt;&lt;br /&gt;
&amp;lt;/table&amp;gt;&lt;br /&gt;
See also, &amp;amp;sect;III.4, Exercise (4) in [https://archive.org/details/foundationsofpot033485mbp Kellogg (1929)].  As is reviewed in an accompanying chapter titled, ''[[User:Tohline/Apps/DysonWongTori#Thin_Ring_Approximation|Dyson-Wong Tori]],'' a number of research groups over the years have re-derived this &amp;quot;thin ring&amp;quot; approximation in the context of their search for effective and insightful ways to determine the gravitational potential of axisymmetric systems.&lt;/div&gt;</summary>
		<author><name>Tohline</name></author>
	</entry>
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