Tossup

The square root of a quantity denoted by this letter approximates the linear structure growth rate f and is strongly correlated with sigma-8. Jim Peebles defines the dimensionless parameter E as the harmonic mean of several quantities denoted by this letter, weighted by powers of a. The cube root of a ratio of two quantities denoted by this letter determines when the matter-dominated era ended. (10[1]-5[1])A dimensionless value (-5[1])approximately equal to 0.7 (10[1])is denoted (10[1])“[this letter]-sub-lambda,” (-5[1])while similar values are about 0.05 for baryons and 0.3 for matter. Another value denoted by this letter (10[1])was measured to be approximately one by the Planck collaboration, (-5[1])implying (-5[1])that the universe (-5[1])has almost (-5[1])zero (-5[1])curvature. For (-5[1])10 (10[1])points, (10[1])name this Greek letter that represents the ratio between energy density and the critical density, the density parameter. ■END■ (10[1]0[24])

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