Calculus of variations establishes a framework to determine the extrema of functionals—mappings from functions to real numbers—which has been pivotal in elucidating natural principles such as the ...

Lyme disease is a common tick-borne illness caused by a bacterium, which is transmitted to humans through the bite of infected ticks. In a paper published, authors propose a reaction-diffusion model ...

Looking at more than 2,000 U.S. high schools that one might imagine are most likely to succeed based on their student demographics, a new study finds strikingly wide variations in the share of ...