We prove some Liouville theorems for a degenerate elliptic operator whose principal part is given in divergence form with respect to the Heisenberg vector fields and lower terms satisfy Fuchsian-type conditions with respect to the intrinsic norm.
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Maria Rosaria Lancia, Maria Vittoria Marchi, Liouville Theorems for Fuchsian-Type Operators on the Heisenberg Group. Z. Anal. Anwend. 16 (1997), no. 3, pp. 653–668DOI 10.4171/ZAA/783