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

Researchers have combined the Dijkstra and Bellman-Ford algorithms to develop an even faster way to find the shortest paths ...

Abstract: Real-time (RT) electromagnetic transient simulation is growing in popularity for hardware-in-the-loop (HIL) simulation of physical hardware devices. This article proposes a variable-step ...

Abstract: With the increasing demand for batch testing of fiber optic gyroscopes (FOGs) scale factor, accurate and low-complexity change point detection methods are essential for identifying state ...

Rachel Maddow looks at recent examples of Donald Trump using the power of American taxpayers to cut deals for himself and his friends and family, and focuses on the especially galling case of Trump ...

The original version of this story appeared in Quanta Magazine. If you want to solve a tricky problem, it often helps to get organized. You might, for example, break the problem into pieces and tackle ...