Abstract
First-principle calculations of YSn3 were performed under both ambient pressure and applied negative hydrostatic pressure. The phonon dispersion relation under all applied pressures was found to have a positive frequency. The superconducting transition temperature (T-c) and average electron-phonon coupling constant ((ep)) was found to increase with increase in applied negative hydrostatic pressure. The Eliashberg spectral function was also calculated under various applied negative hydrostatic pressures.