Date: July 6th, 2018 9:43 PM
Author: Amethyst Parlour
N Number broadcasting Civs
=
R Average rate of suitable star formation, milky way, (stars/year)
* F(p) Fraction of stars that form planets
* n(e) Average habitable planets that form per star
* f(l) Fraction of habitable planets that form life
* f(i) Fraction of habitable planets with life for which life is intelligent
* f(c) Fraction of habitable planets with life for which life is intelligent and is capable of intersellar communication
* L Years f(c)'s transmissions remain detectable
(http://www.autoadmit.com/thread.php?thread_id=4019682&forum_id=2#36378275)