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

Abstract: The limitations of existing synthetic aperture radar (SAR) automatic target recognition methods lie in their confinement by the closed-environment assumption, hindering their effective and ...

VALPARAISO — Bond was set Tuesday morning at $25,000 cash for the man charged with driving intoxicated this past weekend and causing the death of 18-year-old Saelor Guistolisi of Winfield, records ...