Starting a food preservation journey is exciting—especially during the holidays. For beginners, the right tools and resources ...

Topics include: structural results about, and classifying the preservers of positive semidefiniteness and other Loewner properties (monotonicity, convexity, super-additivity); historical connections ...

The anniversaries of 9/11 and Hurricane Katrina have passed. The hottest summer in recent memory, the cause of prolonged East Coast power outages, is finally over. In the wake of the turmoil are ...

Topics include: structural results about, and classifying the preservers of positive semidefiniteness and other Loewner properties (monotonicity, convexity, super-additivity); historical connections ...