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  2. Music and mathematics - Wikipedia

    en.wikipedia.org/wiki/Music_and_mathematics

    A whole tone is a secondary interval, being derived from two perfect fifths minus an octave, (3:2) 2 /2 = 9:8. The just major third, 5:4 and minor third, 6:5, are a syntonic comma , 81:80, apart from their Pythagorean equivalents 81:64 and 32:27 respectively.

  3. Ptolemy's table of chords - Wikipedia

    en.wikipedia.org/wiki/Ptolemy's_table_of_chords

    The fractional parts of chord lengths required great accuracy, and were given in sexagesimal notation in two columns in the table: The first column gives an integer multiple of ⁠ 1 / 60 ⁠, in the range 0–59, the second an integer multiple of ⁠ 1 / 60 2 ⁠ = ⁠ 1 / 3600 ⁠, also in the range 0–59.

  4. Musical notation - Wikipedia

    en.wikipedia.org/wiki/Musical_notation

    The duration (note length or note value) is indicated by the form of the note-head or with the addition of a note-stem plus beams or flags. A stemless hollow oval is a whole note or semibreve, a hollow rectangle or stemless hollow oval with one or two vertical lines on both sides is a double whole note or breve.

  5. Unit disk - Wikipedia

    en.wikipedia.org/wiki/Unit_disk

    In mathematics, the open unit disk (or disc) around P (where P is a given point in the plane), is the set of points whose distance from P is less than 1: = {: | | <}. The closed unit disk around P is the set of points whose distance from P is less than or equal to one:

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Some areas of mathematics, such as statistics and game theory, are developed in close correlation with their applications and are often grouped under applied mathematics. Other areas are developed independently from any application (and are therefore called pure mathematics) but often later find practical applications. [2] [3]

  7. Disk (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Disk_(mathematics)

    In geometry, a disk (also spelled disc) [1] is the region in a plane bounded by a circle. A disk is said to be closed if it contains the circle that constitutes its boundary, and open if it does not. [2] For a radius, , an open disk is usually denoted as and a closed disk is ¯.

  8. Flexi disc - Wikipedia

    en.wikipedia.org/wiki/Flexi_disc

    On April 2, 2012, Third Man Records released 1000 flexi discs tied to blue helium balloons into the air in Nashville, Tennessee. The discs contained the first release of "Freedom At 21", a track on Jack White's debut solo album, Blunderbuss. It is estimated that fewer than 100 of the discs will ever be found and they will be a valuable ...

  9. Category:Mathematics of music - Wikipedia

    en.wikipedia.org/wiki/Category:Mathematics_of_music

    This category has the following 2 subcategories, out of 2 total. M. Musical tuning (13 C, 51 P) S. Musical set theory (1 C, 23 P) Pages in category "Mathematics of music"