Quantum computers may solve problems beyond supercomputers. A new test helps confirm quantum answers for errors.

We all love a mathematical brainteaser here at IFLS. Monty Hall? Done it mate. Two circles shoved into a quadrilateral of unknown size? Been there, solved that. Some Singaporean kids’ seemingly ...

Can you chip in? The Internet Archive is a nonprofit fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, sell user ...