... D and Manzhirov, A V., Handbook of Integral Equations: Exact Solutions (Supplement Some Functional Equations) [in Russian], Faktorial, Moscow, 1998 Polyanin, A D and Zaitsev, V F., Handbook of ... et – dt t for x < 0, for x > for x > 0, for x < 0, for x > 0, for x > 0, where C = 0.5772 is the Euler constant 18.2.2-2 Expansions as x → and x → ∞ Expansion into series in powers of x as x ... solutions of some linear and nonlinear difference and functional equations with several independent variables References for Chapter 17 Acz´ l, J., Functional Equations: History, Applications and Theory,...