2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17629We discuss the phase diagram of the Shastry-Sutherland model for arbitrary spin S and derive rigorous lower and upper bounds on the phase boundaries of the dimer phase by using various versions of a variational ansatz in combination with the exact diagonalisation method.13 pages, 8 figuresStatistical Mechanicstext