i

i
   a mathematical number equal to the square root of -1. Although often called the imaginary unit, i is quite real in many applications. For example, in vector geometry it is used to represent a counterclockwise rotation by 90°. The Swiss mathematician Leonhard Euler (1707-1783) introduced the symbol i for the imaginary unit in 1777.

Dictionary of units of measurement. 2015.

Игры ⚽ Поможем решить контрольную работу

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