Back in the year 2000, the Clay Mathematics Institute announced the “Millennium Prize problems”, which is basically a group of the most important maths problems that still remain unsolved. The ...

In 2020 one of us, Toni, asked another of us, Marco, to come to his office at the Institute of Photonic Sciences, a large research center in Castelldefels near Barcelona. “There is a problem that I ...

Have you ever sat in a math classroom and wondered, “When will I ever use this?” You might have asked yourself this question when you first encountered “imaginary” numbers, and with good reason: What ...