Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

If the capital city seems a bit brighter at night, that’s because more streetlights remain lit. In stops and starts, the city of St. Paul has begun to get a handle on the copper wire thefts that for ...

Ticker is a weekly newsletter by Vijay L Bhambwani. Subscribe to Mint's newsletters to get them directly in your email inbox.

The defining characteristic of a coil is its inductance, denoted by the symbol 'L'. Inductance is a measure of a coil's ...