On the cohomology of plus/minus Selmer groups of supersingular elliptic curves in weakly ramified base fields

Let E/Q be an elliptic curve and let p 5 be a prime of good supersingular reduction. We generalize results due to Meng Fai Lim proving Kida's formula and integrality results for characteristic elements of signed Selmer groups along the cyclotomic Zₚ-extension of weakly ramified base fields K/Qₚ.