def getA(self, tInd):
        dt = self.timeSteps[tInd]
        return self.MfMui*self.mesh.edgeCurl*self.MeSigmaI*self.mesh.edgeCurl.T*self.MfMui + (1.0/dt)*self.MfMui
:param int tInd: Time index
dataset/ETHPy150Open simpeg/simpeg/SimPEG/EM/TDEM/TDEM_b.py/ProblemTDEM_b.getA