The square root of 13..........is the length of the hyp. of a right triangle whose smaller two sides are 2, 3..........the start of the primes.....................why else might 2 to the i be so important?........

The two values of the hyp of the right triangle are the square root of 8 and the square root of 10..................a close approx. for e and a an approx. for pi............respectively.........2 is the 1st prime...........kinda like the fundamental....................the line at 1/2..............two to the neg, one ........is 1/2..........................


In mathematics, the harmonic series is the divergent infinite series:

${\displaystyle \sum _{n=1}^{\infty }{\frac {1}{n}}=1+{\frac {1}{2}}+{\frac {1}{3}}+{\frac {1}{4}}+{\frac {1}{5}}+\cdots }$

Its name derives from the concept of overtones, or harmonics in music: the wavelengths of the overtones of a vibrating string are 1/2, 1/3, 1/4, etc., of the string's fundamental wavelength. Every term of the series after the first is the harmonic mean of the neighboring terms; the phrase harmonic mean likewise derives from music.