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*From*: David Bowman <David_Bowman@georgetowncollege.edu>*Date*: Sat, 10 Oct 2020 12:57:33 +0000

Oops!

I just noticed an accidental typo in one of the formulae I gave in my previoius post. I accidentally wrote the coefficient in front of the formula for Dt, i.e. the time interval over which a light beam is in flight from a source until it arrives here now having a redshift z, as the reciprocal of the correct coefficient. I had the coefficient as B [=(3/2)*H_0*sqrt(Omega_lambda)], but the correct coefficient for Dt is 1/B. Here is the corrected formula:

Dt = ln((1 + 1/sqrt(Omega_lambda))*(z + 1)^(3/2)/(1 + sqrt(1 + (A*(z + 1))^3)))/B .

David Bowman

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