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*From*: Brian Whatcott <betwys1@sbcglobal.net>*Date*: Tue, 25 May 2021 15:14:10 +0000 (UTC)

Sometimes I have to wait long for a joyful contribution like this, Tom!

On Saturday, May 22, 2021, 10:58:09 PM CDT, Tom Van Baak <tvb@leapsecond.com> wrote:

Related to this hunt for averages is AGM, Gauss' arithmetic-geometric

mean. [1] [2]

The surprising connection with physics is described here:

http://leapsecond.com/hsn2006/pendulum-period-agm.pdf

/tvb

[1] https://en.wikipedia.org/wiki/Arithmetic%E2%80%93geometric_mean

[2] https://mathworld.wolfram.com/Arithmetic-GeometricMean.html

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**References**:**[Phys-L] rms / conic / arithmetic / geometric averages***From:*John Denker <jsd@av8n.com>

**Re: [Phys-L] rms / conic / arithmetic / geometric averages***From:*David Bowman <David_Bowman@georgetowncollege.edu>

**Re: [Phys-L] rms / conic / arithmetic / geometric averages***From:*Tom Van Baak <tvb@LeapSecond.com>

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