Abstract: In this paper, we present a novel convolution theorem which encompasses the well known convolution theorem in (graph) signal processing as well as the one related to time-varying filters.

SAN FRANCISCO – Basketball is often lauded as a game of skill. Gifted ball-handlers jet through the open court. Talented shooters turn slivers of space into spectacular shots. Deft passers transform ...

This is an updated version of a story first published on May 5, 2024. For many high school students returning to class, it may seem like geometry and trigonometry were created by the Greeks as a form ...

When the digital revolution first hit classrooms in the early 2010s—and more schools began issuing laptops or tablets to students for individual use—online learning seemed to promise a faster, easier ...

From 1999 to 2006, the average tenure of departing chief executive officers in the United States declined from about 10 years to slightly more than eight. Although some CEOs stay a long time, a lot of ...

At the recent World Congress on Osteoarthritis (OARSI) 2025 Annual Meeting in Incheon, South Korea, speaker after speaker presented on studies that were carefully designed to identify even the ...

Nernst's theorem—a general experimental observation presented in 1905 that entropy exchanges tend to zero when the temperature tends to zero—has been directly linked to the second principle of ...

New details revealed by The Times show that the failures on Jan. 29 before an Army helicopter crashed into a jet near Reagan National Airport were far more complex than previously known. New details ...