Short for 確率変動 (kakuritsu hendō).

"sleeping in the springtime, unaware of dawn": referring to sleeping in late on a comfortable spring day

an irregular verb

E flat major (Major scale of E flat)

(calculus) calculus of variations - The form of calculus that deals with the maxima and minima of definite integrals of functions of many variables

(grammar) a verbal conjugation class in which the verb stem ends in k-, with minor historical changes