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We discuss the possibilities of the simultaneous determination of theneutrino masses and the evolution of dark energy from future cosmologicalobservations such as cosmic microwave background (CMB), large scale structure(LSS) and the cross correlation between them. Recently it has been discussedthat there is a degeneracy between the neutrino masses and the equation ofstate for dark energy. It is also known that there are some degeneracies amongthe parameters describing the dark energy evolutions. We discuss theimplications of these on the cross correlation of CMB with LSS in some details.Then we consider to what extent we can determine the neutrino masses and thedark energy evolution using the expected data from CMB, LSS and their crosscorrelation.Comment: 18 pages, 8 figure

On the determination of neutrino masses and dark energy evolution from the cross-correlation of CMB and LSS