2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164894We consider the two-dimensional problem of recovering globally in time the heat distribution on the surface of a layer inside of a heat conducting body from two interior temperature measurements. The problem is ill-posed. The approximation function is represented by a two-dimensional Sinc series and the error estimate is given.10 pagesAnalysis of PDEs35K05, 31A25, 44A35text