2023-194

Consider the bipartite network in which the nodes are animals and the nodes are environments. If an animal $a$ lives in an environment $e$, then there is a link between $a$ and $e$. Take the following image as an example of part of this network.

If a scientist wants to know possible interactions among animals, they need to know which ones live together. One way to determine this it to:

1. Get all nodes of $A$; only the ones with the same degree live in the same environment
2. Calculate the probabilistic distribution $p_k$ of degrees; if $p_k$ is the same for two values $k_1$ and $k_2$, then the nodes of $A$ with degree $k_1$ live together with the ones of degree $k_2$
3. Calculate the projection on $A$; if two animal nodes are connected in the projection, then they share the same environment
4. Check which nodes of $A$ are connected; if they are, they share the same environment
5. None of the above

Originasl idea by: Christian Konishi