Some identities of degenerate higher-order Daehee polynomials based on $\lambda$-umbral calculus

The degenerate versions of special polynomials and numbers, initiated by Carlitz, have regained the attention of some mathematicians by replacing the usual exponential function in the generating function of special polynomials with the degenerate exponential function. To study the relations between degenerate special polynomials, $\lambda$-umbral calculus, an analogue of umbral calculus, is intensively applied to obtain related formulas for expressing one $\lambda$-Sheffer polynomial in terms of other $\lambda$-Sheffer polynomials. In this paper, we study the connection between degenerate higher-order Daehee polynomials and other degenerate type of special polynomials. We present explicit formulas for representations of the polynomials using $\lambda$-umbral calculus and confirm the presented formulas between the degenerate higher-order Daehee polynomials and the degenerate Bernoulli polynomials, for example. Additionally, we investigate the pattern of the root distribution of these polynomials.