def MfRhoDeriv(self,u):
        return self.mesh.getFaceInnerProductDeriv(self.curModel.rho)(u) * (-Utils.sdiag(self.curModel.rho**2) * self.curModel.sigmaDeriv)
        # self.curModel.rhoDeriv
Derivative of :code:`MfRho` with respect to the model.
dataset/ETHPy150Open simpeg/simpeg/SimPEG/EM/Base.py/BaseEMProblem.MfRhoDeriv