This is sure to be a growth area for the applications of calculus. Mathematical biology is a no-holds-barred exercise in nonlinear differential equations. With the help of Newton-style analytical methods, Poincaré-style geometric methods, and an unabashed reliance on computers, mathematical biologists are looking for and starting to make headway on the differential equations that govern heart rhythms, the spread of epidemics, the functioning of the immune system, the orchestration of genes, the development of cancer, and many other mysteries of life. We couldn’t do any of it without calculus.
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