TITLE: (Co)homology theory and electrical circuit
QUESTION [15 upvotes]: I have read that one of the origins of the theory of (co)homology is the study of electrical circuits by Poincare. I'd like to know more about that. Could someone sugest any reference on this subject?

REPLY [6 votes]: An additional reference is "Graphs and Networks. The Picard-Lefschetz Theory and Feynman Integrals" by Lefschetz . Chapter electrical circuit