incumbent noun [C]. âº the âperson who has or had a âparticular âofficial âposition: the first/last/âprevious incumbent The âpresent incumbent (of the âpost) is âdue to âretire next âmonth. (Definition of incumbent from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press). See all translations.
In music, a linear progression (Auskomponierungszug or Zug, abbreviated: Zg. ) is a passing note elaboration involving stepwise melodic motion in one direction between two harmonic tones.  The compositional unfolding of a specific interval, one of the intervals of the chord of nature.
The product of a geometric progression is the product of all terms. If all terms are positive, then it can be quickly computed by taking the geometric mean of the progression's first and last term, and raising that mean to the power given by the number of terms.