... left- and right-hand sides of (15)to obtainCP(D)x,P(D)x(t, ω) = Cf(t, ω), (29) and we use (24 )and( 26) to simplify toP∗Ac)Cx,P(D)x(t, ω) = Cf(t, ω). (30)Similarly, we apply (25 )and( 27)toobtain(17).3.2. ... coeffi-cients are the most venerable and studied differential equa-tions, and many ideas and methods have been de veloped toobtain exact, approximate, and numerical solutions, and toqualitatively study ... engi-neering, and also as quasidistributions in quantum mechan-ics [4, 9, 10]. A major development has been done in this area and the ideas that have developed have become standard and powerful...