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Parallel (operator)

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The parallel operator is a mathematical function which is used as a shorthand in electrical engineering, but is also used in kinetics, fluid mechanics and financial mathematics. The name parallel comes from the use of the operator computing the combined resistance of resistors in parallel.

WP 34S with parallel operator (∥) on the g+÷ key.

Harmonic mean

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In mathematics, the harmonic mean is one of several kinds of average, and in particular, one of the Pythagorean means. It is sometimes appropriate for situations when the average rate is desired.

Harmonic mean for Beta distribution for 0 < α < 5 and 0 < β < 5

Harmonic Means for Beta distribution Purple=H(X), Yellow=H(1-X), smaller values alpha and beta in front

Harmonic Means for Beta distribution Purple=H(X), Yellow=H(1-X), larger values alpha and beta in front