2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123048The $2^{nd}$ variation formula of the Seiberg-Witten functional is obtained in order to estimate the Morse index of redutible solutions $(A,0)$. It is shown that their Morse index is given by the dimension of the largest negative eigenspace of the operator $\triangle_{A} +\frac{k_{g}}{4}$, hence it is finite.09 pagesMathematical PhysicsDifferential Geometry58Exx, 53C27, 57R57text