Harmonic number (disambiguation)

In number theory, the harmonic numbers are the sums of the inverses of integers, forming the harmonic series. Harmonic number may also refer to:

Harmonic, a periodic wave with a frequency that is an integral multiple of the frequency of another wave
An integer not divisible by any prime other than 2 or 3, as defined by Philippe de Vitry
Harmonic divisor numbers, also called Ore numbers or Ore's harmonic numbers, positive integers whose divisors have an integral harmonic mean

This article is issued from Wikipedia - version of the 2/15/2009. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.