Table 1: Parameters for the potential . is the current age of the universe with  Gyr in the CDM model, for , the “coincidence” time interval , is the turn-around time, is the time of the big crunch, and . All times are in Gyr. For = 0.20 (0.23), 0.85 (0.77) and in these cases and , respectively.


0.73 13.72 3.6 20.0 63.2 72.7 0.23 12.0
0.78 13.70 3.5 20.3 47.6 56.8 0.30 5.0
0.88 13.64 3.5 21.2 37.6 46.2 0.38 3.0
1.09 13.49 3.3 21.2* 29.2 37.0 0.48 2.0
1.41 13.25 3.0 16.8* 23.9 30.7 0.45 1.6