How Does This Equation Relate to Protein Structure Prediction?

[TheTechNoir]

Sorry if this is inappropriate to post here, if so it can be moved to general chat or closed or whatever. Also sorry about the vague thread title, I have no mathematics background at all.

http://www.biomedcentral.com/content/inline/1471-2105-8-171-i11.gif

I'm wondering if someone can, very loosely say what this is 'about' if that makes any sense within the context of that problem or equation I don't have a clue.

The reason I ask is someone posted it in a thread on a non-science or mathematics forum irrelevantly, they were discussing something completely different and just messing around I guess he said 'only x person can save us now' posted the image of that and said can someone double check my work? I'd like to post a response saying "What does <whatever that is related to> have anything to do with this?" just as a joke as well to take him off-guard.

 

[DeadOriginal]

Don't take my word for it but I think that has something to do with probability.

At the top where it has this equation that looks similar to H(P/Q) except the slash is straight, I don't know what H stands for but (P/Q) should mean P given Q. Hope that helps.

Someone please correct me if I'm wrong.

 

[Perfection]

Using my awesome google powers I found the article it was ripped from

http://www.biomedcentral.com/1471-2105/8/171

 

[DarthPickley]

for some reason it reminds me of the definition of matrix multiplication...