harmonic progression

harmonic progression

noun Mathematics.
a series of numbers the reciprocals of which are in arithmetic progression.

Origin:
1865–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Harmonic progression is always a great word to know.
So is perfect number. Does it mean:
a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3
a series of points as in forming a curve or surface, each of which represents a value of a given function, a network of lines connecting points
Collins
World English Dictionary
harmonic progression
 
n
a sequence of numbers whose reciprocals form an arithmetic progression, as 1, ½, 1⁄3, …

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
harmonic progression  
A sequence of quantities whose reciprocals form an arithmetic progression, such as 1, 1/3 , 1/5 , 1/7 , .... and so on.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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