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	Comments on: Mathematics of Phi, 1.618, the Golden Number	</title>
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	<description>Golden Ratio, Phi, 1.618, and Fibonacci in Math, Nature, Art, Design, Beauty and the Face. One source with over 100 articles and latest findings.</description>
	<lastBuildDate>Tue, 09 Dec 2025 17:44:40 +0000</lastBuildDate>
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	<item>
		<title>
		By: Tom Helma		</title>
		<link>https://www.goldennumber.net/math/#comment-8038</link>

		<dc:creator><![CDATA[Tom Helma]]></dc:creator>
		<pubDate>Tue, 09 Dec 2025 17:44:40 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://www.goldennumber.net/math/#comment-3877&quot;&gt;Gary B Meisner&lt;/a&gt;.

The fractional parts of both Phi and its reciprocal (1/Phi) and its square (Phi^2) have the same fractional component.
Solving the quadratic equation 0 = x^2 – x – 1 produces the solutions:
Phi = (1+5^.5)/2   and   Phi = (1-5^.5)/2    
Taking the positive solution, you get Phi.
Phi = 1.61803398874989    1/Phi = 0.61803398874989     Phi^2 = 2. 61803398874989
However;
Solving the quadratic equation 0 = x^2 – x*i – 1 produces the solutions:
Phi(i) = (i+(i^2 + 1)^.5)/2   and   Phi = (i-(i^2 + 1)^.5)/2 
 Taking the positive solution, you get Phi(i).
Phi(1) = 1.6180339887   1/ Phi(1) = 0.6180339887	   Phi(1)^2-((1-1)/ Phi(1)) = 2.6180339887
Phi(2) = 2.4142135624   1/ Phi(2) = 0.4142135624    Phi(2)^2-((2-1)/ Phi(2)) = 5.4142135624
Phi(3) = 3.3027756377   1/ Phi(3) = 0.3027756377    Phi(3)^2-((3-1)/ Phi(3)) = 10.3027756377
Phi(4) = 4.2360679775   1/ Phi(4) = 0.2360679775    Phi(4)^2-((4-1)/ Phi(4)) = 17.2360679775
All positive integers produce a number whose fractional parts of both Phi(i), its 
reciprocal (1/ Phi(i)) and  Phi(i)^2-((i-1)/ Phi(i)) are the same.
Phi also can be used to create the “Golden Rectangle”. The golden triagonal is defined as a rectangle whose sides have the ratio of Phi. This rectangle has the property such that if a square is removed from the rectangle, a rectangle with the same proportion remains. 
The other versions of Phi are similar. A rectangle whose sides have the ratio of Phi(i) will have the attribute such for every integer value of i, remove i squares and you are left with a rectangle of the same proportion as the original. In other words, for i = 1 where Phi(1) is 1.61803… remove one square, for i = 2 where Phi(2) is 2.414213…  remove two squares.  

If this has been documented elsewhere, please let me know where.]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://www.goldennumber.net/math/#comment-3877">Gary B Meisner</a>.</p>
<p>The fractional parts of both Phi and its reciprocal (1/Phi) and its square (Phi^2) have the same fractional component.<br />
Solving the quadratic equation 0 = x^2 – x – 1 produces the solutions:<br />
Phi = (1+5^.5)/2   and   Phi = (1-5^.5)/2<br />
Taking the positive solution, you get Phi.<br />
Phi = 1.61803398874989    1/Phi = 0.61803398874989     Phi^2 = 2. 61803398874989<br />
However;<br />
Solving the quadratic equation 0 = x^2 – x*i – 1 produces the solutions:<br />
Phi(i) = (i+(i^2 + 1)^.5)/2   and   Phi = (i-(i^2 + 1)^.5)/2<br />
 Taking the positive solution, you get Phi(i).<br />
Phi(1) = 1.6180339887   1/ Phi(1) = 0.6180339887	   Phi(1)^2-((1-1)/ Phi(1)) = 2.6180339887<br />
Phi(2) = 2.4142135624   1/ Phi(2) = 0.4142135624    Phi(2)^2-((2-1)/ Phi(2)) = 5.4142135624<br />
Phi(3) = 3.3027756377   1/ Phi(3) = 0.3027756377    Phi(3)^2-((3-1)/ Phi(3)) = 10.3027756377<br />
Phi(4) = 4.2360679775   1/ Phi(4) = 0.2360679775    Phi(4)^2-((4-1)/ Phi(4)) = 17.2360679775<br />
All positive integers produce a number whose fractional parts of both Phi(i), its<br />
reciprocal (1/ Phi(i)) and  Phi(i)^2-((i-1)/ Phi(i)) are the same.<br />
Phi also can be used to create the “Golden Rectangle”. The golden triagonal is defined as a rectangle whose sides have the ratio of Phi. This rectangle has the property such that if a square is removed from the rectangle, a rectangle with the same proportion remains.<br />
The other versions of Phi are similar. A rectangle whose sides have the ratio of Phi(i) will have the attribute such for every integer value of i, remove i squares and you are left with a rectangle of the same proportion as the original. In other words, for i = 1 where Phi(1) is 1.61803… remove one square, for i = 2 where Phi(2) is 2.414213…  remove two squares.  </p>
<p>If this has been documented elsewhere, please let me know where.</p>
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		<title>
		By: Tom		</title>
		<link>https://www.goldennumber.net/math/#comment-7193</link>

		<dc:creator><![CDATA[Tom]]></dc:creator>
		<pubDate>Mon, 20 Nov 2023 18:15:46 +0000</pubDate>
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					<description><![CDATA[I know this is years late, but the topic was already thousands of years old when this was written, so I think I&#039;m good 😁. 

There&#039;s an error in the text of the derivation. 

The rearranged derivation is down to 
B² – B – 1 = 0

Then the reader is introduced to a quadratic equation
ax² + bx + c = 0

But then this substitution is given as the formula for the golden ratio, which is now no longer a quadratic equation in one variable.
1a² - 1b¹ - 1c = 0

I assume what was meant was this:
aB² + bB + c = 0, where a=1, b=-1, and c=-1]]></description>
			<content:encoded><![CDATA[<p>I know this is years late, but the topic was already thousands of years old when this was written, so I think I&#8217;m good 😁. </p>
<p>There&#8217;s an error in the text of the derivation. </p>
<p>The rearranged derivation is down to<br />
B² – B – 1 = 0</p>
<p>Then the reader is introduced to a quadratic equation<br />
ax² + bx + c = 0</p>
<p>But then this substitution is given as the formula for the golden ratio, which is now no longer a quadratic equation in one variable.<br />
1a² &#8211; 1b¹ &#8211; 1c = 0</p>
<p>I assume what was meant was this:<br />
aB² + bB + c = 0, where a=1, b=-1, and c=-1</p>
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		<title>
		By: Orlando mcallister		</title>
		<link>https://www.goldennumber.net/math/#comment-7099</link>

		<dc:creator><![CDATA[Orlando mcallister]]></dc:creator>
		<pubDate>Thu, 17 Aug 2023 20:39:39 +0000</pubDate>
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					<description><![CDATA[This is indeed a very complex equation in trying to describe the nonlinear construction and behavior of the Cosmos. Phi is a nonlinearly derived number in base ten arithmetic. The thing to do is to translate it into various number systems; perhaps to the Mayan system of counting in base 5 and 20 or the Ethiopian base 13 system….]]></description>
			<content:encoded><![CDATA[<p>This is indeed a very complex equation in trying to describe the nonlinear construction and behavior of the Cosmos. Phi is a nonlinearly derived number in base ten arithmetic. The thing to do is to translate it into various number systems; perhaps to the Mayan system of counting in base 5 and 20 or the Ethiopian base 13 system….</p>
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		<title>
		By: Why Is A4 Called A4? &#8211; Pietroortolani		</title>
		<link>https://www.goldennumber.net/math/#comment-6399</link>

		<dc:creator><![CDATA[Why Is A4 Called A4? &#8211; Pietroortolani]]></dc:creator>
		<pubDate>Thu, 03 Mar 2022 13:05:15 +0000</pubDate>
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					<description><![CDATA[[&#8230;] 1 / Φ = Φ – 1. These relationships are derived from the dividing a line at its golden section point, the point at which the ratio of the line (A) to the larger section (B) is the same as the ratio of the larger section (B) to the smaller section (C). A / B = B / C. via [&#8230;]]]></description>
			<content:encoded><![CDATA[<p>[&#8230;] 1 / Φ = Φ – 1. These relationships are derived from the dividing a line at its golden section point, the point at which the ratio of the line (A) to the larger section (B) is the same as the ratio of the larger section (B) to the smaller section (C). A / B = B / C. via [&#8230;]</p>
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		<title>
		By: Sentamil		</title>
		<link>https://www.goldennumber.net/math/#comment-6356</link>

		<dc:creator><![CDATA[Sentamil]]></dc:creator>
		<pubDate>Thu, 27 Jan 2022 04:16:35 +0000</pubDate>
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					<description><![CDATA[1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597

1/1=1
2/1=2
3/2=1.5
5/3=1.666
8/5=1.6
13/8=1.625
21/13=1.61538]]></description>
			<content:encoded><![CDATA[<p>1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597</p>
<p>1/1=1<br />
2/1=2<br />
3/2=1.5<br />
5/3=1.666<br />
8/5=1.6<br />
13/8=1.625<br />
21/13=1.61538</p>
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		<title>
		By: Sentamil		</title>
		<link>https://www.goldennumber.net/math/#comment-6355</link>

		<dc:creator><![CDATA[Sentamil]]></dc:creator>
		<pubDate>Thu, 27 Jan 2022 03:49:47 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://www.goldennumber.net/math/#comment-4618&quot;&gt;Carl Timothy Morris, MD&lt;/a&gt;.

Can you explain the statement (PHI + PI) Tanh = 1]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://www.goldennumber.net/math/#comment-4618">Carl Timothy Morris, MD</a>.</p>
<p>Can you explain the statement (PHI + PI) Tanh = 1</p>
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		<title>
		By: Sentamil		</title>
		<link>https://www.goldennumber.net/math/#comment-6354</link>

		<dc:creator><![CDATA[Sentamil]]></dc:creator>
		<pubDate>Thu, 27 Jan 2022 03:44:56 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://www.goldennumber.net/math/#comment-665&quot;&gt;gaurav&lt;/a&gt;.

The series is actually 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597..............
This is Fibonacci series.

For 2 3 8 21 55
#2+3(2)=8
#3+8(2)=19
so this is not a perfect sequence.

The sequence should include 5 13 34 for a complete list.]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://www.goldennumber.net/math/#comment-665">gaurav</a>.</p>
<p>The series is actually 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597&#8230;&#8230;&#8230;&#8230;..<br />
This is Fibonacci series.</p>
<p>For 2 3 8 21 55<br />
#2+3(2)=8<br />
#3+8(2)=19<br />
so this is not a perfect sequence.</p>
<p>The sequence should include 5 13 34 for a complete list.</p>
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		<title>
		By: DDSharma		</title>
		<link>https://www.goldennumber.net/math/#comment-5678</link>

		<dc:creator><![CDATA[DDSharma]]></dc:creator>
		<pubDate>Mon, 25 Jan 2021 15:08:05 +0000</pubDate>
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					<description><![CDATA[Golden ratio is pretty useful in my theoretical physics viz Thoughtonics. I need to learn it&#039;s all details.]]></description>
			<content:encoded><![CDATA[<p>Golden ratio is pretty useful in my theoretical physics viz Thoughtonics. I need to learn it&#8217;s all details.</p>
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		<title>
		By: DDSharma		</title>
		<link>https://www.goldennumber.net/math/#comment-5677</link>

		<dc:creator><![CDATA[DDSharma]]></dc:creator>
		<pubDate>Mon, 25 Jan 2021 15:05:26 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://www.goldennumber.net/math/#comment-4985&quot;&gt;Toyne&lt;/a&gt;.

Thoughtonics says a super- verse got biggest crunch to be Shunyat ie. Zerot which is zero thought and that starts new. Super-verse.]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://www.goldennumber.net/math/#comment-4985">Toyne</a>.</p>
<p>Thoughtonics says a super- verse got biggest crunch to be Shunyat ie. Zerot which is zero thought and that starts new. Super-verse.</p>
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		<title>
		By: DDSharma		</title>
		<link>https://www.goldennumber.net/math/#comment-5676</link>

		<dc:creator><![CDATA[DDSharma]]></dc:creator>
		<pubDate>Mon, 25 Jan 2021 14:42:27 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://www.goldennumber.net/math/#comment-664&quot;&gt;Daniel Hazelton Waters&lt;/a&gt;.

I&#039;m DDSharma, creator of physics of Thoughtonics, find golden ratio useful in my theory.]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://www.goldennumber.net/math/#comment-664">Daniel Hazelton Waters</a>.</p>
<p>I&#8217;m DDSharma, creator of physics of Thoughtonics, find golden ratio useful in my theory.</p>
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