“…In this section, we employ the definition of the 2-variable truncated-exponential-based Apostol-type polynomials e (r) Y (α) n,β (x, y; k, a, b) that help in proving the generalizations of the previous works of Khan et al [33] and Pathan and Khan (see [34][35][36]). For the derivation of implicit formulas involving the 2-variable truncated-exponential-based Apostol-type polynomials e (r) Y (α) n,β (x, y; k, a, b), the same considerations as developed for the ordinary Hermite and related polynomials in the works by Khan et al [33] and Pathan et al (see [34][35][36]) apply as well. We first prove the following results involving the 2-variable truncated-exponential-based Apostol-type polynomials e (r) Y (α) n,β (x, y; k, a, b).…”