2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103692This paper provides an extension for a function $u \in BV_H(Ω)$ to a function $u_0 \in BV_H(G)$ when $Ω$ is ``H-admissible,'' and G is a step 2 Carnot group. It is shown that H-admissible domains include non-characteristic domains and domains in groups of Heisenberg type which have a partial symmetry about characteristic points. An example is given of a domain that is $C^{1,α}$, $α<1$, that is not H-admissible. Further, when $Ω$ is H-admissible a trace theorem is proved for $u \in BV_H(Ω)$.20 pagesAnalysis of PDEs46E35; 22E25text