A Mathematical ‘Fever Dream’ Hits the Road

Ingrid Daubechies, a mathematician at Duke University, is an expert on many matters, not least the baking of cookies in the shape of pi, the mathematical constant that equals the ratio of a circle’s circumference to its diameter, or roughly 3.14159. A sugar cookie recipe works fine, Dr. Daubechies says. But she prefers a savory … Read more

Trump Sees ‘Good Signals’ on Russia-Ukraine Cease-Fire. Zelensky Does Not.

President Trump said Thursday he saw “good signals” toward finalizing a 30-day cease-fire agreement between Russia and Ukraine, as U.S. officials visiting Moscow were expected to meet with President Vladimir V. Putin of Russia. The remarks, delivered in the Oval Office while meeting with NATO Secretary General Mark Rutte, came as Mr. Putin made clear … Read more