The Hairy Ball theorem, proved by Henri Poincaré in 1885, demonstrates that it's impossible to create a perfectly smooth hair pattern on a spherical surface. The theorem states that any continuous ...

Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...

For generations, Indian students have learnt it simply as the Pythagoras Theorem. In a quiet but significant shift, the Class 8 NCERT mathematics textbook has now introduced it as the ...

Clair Obscur: Expedition 33 is full of twists, turns, and world-changing events even before reaching the final act. So, it trusts that you’ve been paying full attention well before the final battle.

Discover exceptions to the law of demand, like Giffen and Veblen goods, and understand why they don't disprove core economic principles.