The harmonic mean is calculated by dividing the number of observations, or entries in the series, by the reciprocal of each number. In contrast, the arithmetic mean is simply the sum of a series ...

I was having dinner with a visiting colleague this week when talk turned to what we were teaching this term. He mentioned the part of calculus dealing with infinite series (the bane of many ...

The series are set out clearly on one page, and the sum on the page facing. In spite of the compiler's intentions, we believe the collection will be of value mainly to the not too advanced student.

The representation of a PERIODIC sound or WAVEFORM as a sum of Fourier components (i.e. pure SINUSOIDAL WAVEs). According to the FOURIER THEOREM, periodic sound may be shown to consist of SINE WAVEs ...

Hermit thrushes appear to prefer singing in harmonic series—a fundamental component in human music. The birds' musical taste is likely a product of biology, which might provide clues in an age ...