The Irish Times

Complexity: are easily-checked problems also easily solved?

That’s Maths: Many problems are hard to solve but easy to verify, such as Sudoku puzzles

Thu Feb 04 2021 - 01:00

Validity of equations used to model turbulence has not been proven. Can you help?

Thu Oct 20 2016 - 00:00

A brilliant Russian proved Poincaré’s conjecture that the hypersphere is the only solid shape with no holes

Thu Feb 05 2015 - 01:00