She is one of the world’s experts in what she and others in her field call ‘digital mathematics’: a term of their own to ...

Mette Frederiksen may not be nearly as popular as she once was, but she remains the Danes’ most dominant leader in decades.

Chocolate-box buildings with brimming flower boxes. An imposing fortress, encircled by cannons. Soaring city walls, cobbled squares, horse-and-carriage rides. Where in the world are you? You’d ...