“…These quests for degenerat versons are not only limited to special polynomials and numbers but also extended to some transcendental functions, like gamma functions (see [11]). Many different tools are used, which include generating functions, combinatorial methods, p-adic analysis, umbral calculus, operator theory, differential equations, special functions, probability theory and analytic number theory (see [8][9][10]12,14,16] and the references therein). It is also worth mentioning that λ -umbral calculus has been introduced in [8], which turns out to be more convenient than the 'classical' umbral calculus when dealing with degenerate Sheffer polynomials.…”