Arabian Journal of Mathematics, 2025 (ESCI)
Considering a Z3-graded 3-dimensional space, we develop Z3-graded differential calculi on the algebra of functions defined on this space, which is a Z3-graded Hopf algebra. We demonstrate that these differential calculi admit a ∗-operation. Additionally, we discover a new Z3-graded upper triangular quantum group and explicitly define its Z3-graded Hopf algebraic structure. We also show in detail that this quantum group is the symmetry group of one of these calculi.