U.S. fighter jets scrambled Wednesday to intercept four Russian warplanes off the coast of Alaska, the North American Aerospace Defense Command (NORAD) said Thursday. NORAD said in a statement it ...

Abstract: In this note, we define strong and weak common quadratic Lyapunov functions (CQLFs) for sets of linear time-invariant (LTI) systems. We show that the simultaneous existence of a weak CQLF of ...

Abstract: Inspired by the complexity and diversity of biological neurons, a quadratic neuron is proposed to replace the inner product in the current neuron with a simplified quadratic function.

Three Russian fighter jets have violated Estonia’s airspace in an ‘unprecedentedly brazen’ incursion onto NATO territory. Estonia’s foreign minister said the MiG-31 military planes, capable of ...