Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Cigna has been in the hot seat over its use of automatic claims processing software since earlier this year, after a ProPublica investigation found Cigna physicians used PxDx to automatically reject ...

Abstract: Class imbalance introduces bias into model learning and remains a persistent and fundamental challenge in machine learning. When class imbalance is coupled with complex data distribution ...

Abstract: The Zak transform can directly map signals from the delay-Doppler domain to the time domain, which has a relatively low complexity for orthogonal time frequency space (OTFS) signal ...