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Matteo Cantiello added Derive L.tex
about 10 years ago
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Let's define $n=N/V$ the number density of communicative civilizations in the Galaxy, where $N$ is the total number of such civilizations populating the Galaxy and $V$ is the total galactic volume. Assuming an homogeneous distribution across the Galaxy, the average spacial separation between two neighbour communicative civilization is $\sim 1/n^{1/3}$.
