This brief presents a necessary and sufficient condition for testing positive, real, imaginary, and negative rational functions. A related term, the positive, imaginary, and negative polynomial, is ...

Superconductivity is an advantageous property observed in some materials, which entails the ability to conduct electricity ...

US President Donald Trump announced a new trade agreement with Indonesia on Tuesday, establishing a 19% tariff on goods ...

The US Commerce Department launched investigations into imports of drones, parts for unmanned aerial vehicles, and ...