Constraints on the Cosmic Equation of State from the DEEP2 Redshift Survey

DEEP2: A Deep Extragalactic Evolutionary Probe

Comparison between DEEP2 and local surveys

The dN /dz test

From counts to cosmology

Cosmic variance

Behavior of n(v_c,z)

Systematic effects: Incompleteness

Systematic effects: s_v

Systematic effects: Baryonic Infall

Constraints on W_m, W_L

Constraints on W_m, W_L

Constraints on W_m, W_L

Constraints on W_m, w

Constraints on W_m, w

DEEP2 will provide many other constraints…

Conclusions