A ring of allies: China, Russia, Iran, Venezuela and Cuba

This piece is not easy or friendly to read. It involves some maths like matrices, Markov chains or eigenvalues. But there is also a lot of geopolitical plain English. I hope it raises some interest applying maths to geopolitics. We analyse the trade relationships among China, Russia, Iran, Venezuela and Cuba, comparing what brings along Maduro’s extraction, so to speak. Enjoy the read.