Encyclopedia > Spiral

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A spiral is a curve which turns around some central point, getting progressively closer to or farther from it (depending on which way you follow the curve). In polar coordinates, then, r is an monotonic function of θ.

Some of the more important sorts of spirals include:

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Fugue (music)

... stage of a fugue is the "recapitulation" where the subject is repeated in the manner it was first introduced (using the same musical mode and without any ornamentations). ...