Anderson猜想之证明.pdf Albert Einstein:How can it be that mathematics, being after all a product of human thought, which is independent of experience, is so admirably appropriate to the objects of reality? ...
The formulation of a problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill. To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science. ...