Just five days after posting a retraction, László Babai announced that he had fixed the error in his landmark graph isomorphism algorithm.

# Articles tagged graph theory

### Complexity Theory Problem Strikes Back

The legendary graph isomorphism problem may be harder than a 2015 result seemed to suggest.

### Landmark Algorithm Breaks 30-Year Impasse

Computer scientists are abuzz over a fast new algorithm for solving one of the central problems in the field.

### In Brain’s ‘Rich Club,’ Meetings of the Mind

Neuroscientists have identified a network of highly linked brain regions that could prove essential in integrating information and facilitating higher-order cognitive tasks.