Mathematics
The Unsolvable Problem
After a years-long intellectual journey, three mathematicians have discovered that a problem of central importance in physics is impossible to solve—and that means other big questions may be undecidable, too...
Stories by Toby S. Cubitt
Toby S. Cubitt is a Royal Society University Research Fellow and reader in quantum information at University College London. After obtaining a Ph.D. in physics, postdoctoral positions in mathematics and a faculty position in computer science, he now works on quantum problems that straddle these areas. Credit: Nick Higgins
