Mathematics

"If an adversary gives you a machine learning model and secretly plants a malicious backdoor in it, what are the chances that you can discover it? Very little, according to a new paper by researchers at UC Berkeley, MIT, and the Institute for Advanced Study."

"In a recent paperManjul Bhargava of Princeton University has settled an 85-year-old conjecture about one of math’s most ancient obsessions: the solutions to polynomial equations such as x2 – 3x + 2 = 0. 'It’s a great problem, famous old question,' said Andrew Granville, a professor at the University of Montreal. '[Bhargava] had an interesting, somewhat different approach, which was very creative.'"

"For more than 250 years, mathematicians have been trying to 'blow up' some of the most important equations in physics: those that describe how fluids flow. If they succeed, then they will have discovered a scenario in which those equations break down — a vortex that spins infinitely fast, perhaps, or a current that abruptly stops and starts, or a particle that whips past its neighbors infinitely quickly."

"Lillian Pierce vividly remembers a moment when she was 4 years old, waiting in her family’s station wagon for her older brother and sister to get out of school, magnolia trees forming pink and white arches overhead. Her mother was sitting in the driver’s seat, writing sequences of numbers in blue ink, balancing her checkbook. Pierce was mesmerized."