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
That’s Maths: Many problems are hard to solve but easy to verify, such as Sudoku puzzles
Validity of equations used to model turbulence has not been proven. Can you help?
A brilliant Russian proved Poincaré’s conjecture that the hypersphere is the only solid shape with no holes
Crosswords & puzzles to keep you challenged and entertained
Inquests into the nightclub fire that led to the deaths of 48 people
How does a post-Brexit world shape the identity and relationship of these islands
Weddings, Births, Deaths and other family notices