Since the 1970s, algorithms have been able to test graph isomorphism, but in exponential time. This means that the increasing ...

Most problems can be solved by many different algorithms, each with its own demands on time and space. Complexity theorists sort problems into categories, called complexity classes, based on the ...

Computational problems are usually proposed as models of real-world problems. In some cases we are interested in just a simple answer to a problem, e.g., any route from A to B minimizing the amount of ...

What do Sudoku, AI, Rubik’s cubes, clocks and molecules have in common? They can all be reimagined as algebraic equations.