The thing that makes our research difficult, the main reason we need big, powerful computers, is a system of a equations known as the “Cardiac Bidomain Equations”. They are a way of representing both the insides and outsides of cells, as well as the membrane in-between, throughout a piece of tissue. A former member of our lab as well as a current one and their colleagues have just come out with a paper entitled, “Solvers for the cardiac bidomain equations”. It discusses why the system is computationally expensive, and tricks for solving it more efficiently, including multigrid methods.