plural noun, Mathematics.
two points whose cross ratio with two specified points equals −1.
- Harmonic distortion
noun 1. (electronics) distortion caused by nonlinear characteristics of electronic apparatus, esp of audio amplifiers, that generate unwanted harmonics of the input frequencies
noun 1. See under (def 6). [in-ter-vuh l] /ˈɪn tər vəl/ noun 1. an intervening period of time: an interval of 50 years. 2. a period of temporary cessation; pause: intervals between the volleys of gunfire. 3. a space between things, points, limits, etc.; interspace: an interval of ten feet between posts. 4. Mathematics. 5. […]
noun, Astronomy. 1. See under . noun, Astronomy. 1. any one of three laws governing planetary motion: each planet revolves in an ellipse, with the sun at one focus; the line connecting a planet to the sun sweeps out equal areas in equal periods of time (law of areas) or the square of the period […]
noun, Statistics. 1. the mean obtained by taking the reciprocal of the arithmetic mean of the reciprocals of a set of nonzero numbers. noun 1. the reciprocal of the arithmetic mean of the reciprocals of a set of specified numbers: the harmonic mean of 2, 3, and 4 is 3(1/2 + 1/3 + 1/4)–1 = […]