Uncertainty on determining the dark energy equation of state due to the   spatial curvature
  We have studied the uncertainty on the determination of the dark energy equation of state due to a non-vanishing spatial curvature by considering some fundamental observables. We discussed the sensitivity of these observables to the value and redshift history of the equation of state and the spatial curvature and investigated whether these different observables are complementary and can help to reduce the cosmic confusion. 
Zhuo-Yi Huang, Bin Wang, Ru-Keng Su