2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229306In this paper, we present an extension of $λμ$-calculus called $λμ^{++}$-calculus which has the following properties: subject reduction, strong normalization, unicity of the representation of data and thus confluence only on data types. This calculus allows also to program the parallel-or.Logictext