Note the use of integer subscripts to differentiate between the pitch-type interval system ([Z.sub.1], [M.sub.1], int
), and interval systems of the pitch-class type ([Z.sub.k], [M.sub.k], int
), k [greater than or equal to] 2.
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., December 22, San Marcial Apts., seven nights, two sharing from pounds 570pp GRAN Canaria, ex- Belfast Boxing Day, Villa del Conde, one week, 2 sharing B&B from pounds 1,423 LANZAROTE, Belfast Int
., 29th Dec 29, San Marcial Apts., 7 nights, 2 sharing from pounds 536pp Gran Canaria, departing Belfast Int
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