**0**wrote:

Dear Experts,

I have a network with two types of nodes: bacteria and fungi. I.e., some of the nodes (10,000 nodes) represent proteins derived from bacterial genome and all other nodes (900 nodes) represent proteins derived from fungal genome.

How do I calculate the maximum possible number of edges between these two groups? I.e., calculate the maximum number of potential edges only between B-F (Bacteria-Fungi), excluding all the edges between B-B and F-F.

Specific example:
**IF I have a network with 10,000 Bacterial nodes, and Fungal 900 nodes, what is the maximum number of B-F edges only (excluding all B-B and F-F?
(Is it 900x10,000 for undirected network? and 2x900x10,000 for directed?)** where x between the numbers represent multiplication.

*I searched the forum, tutorial and all in the search option, to see if the question is already answered. To the best of my knowledge I could not find it - probably due to my lack of knowledge in the field - so if you find this a duplicate question, kindly apologize and provide me with the link to the answer.*

Thank you in advance for your reply, Eswari

**18k**• written 7 weeks ago by eswaripj •

**0**

Please leave the classification as a

`question`

.`Forum`

posts are used for issues where there is topic of general interest that many can weigh in.67kGenomax, Thank you for changing the classification and explaining.

0