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Count down to Christmas with maths!

Where do the magnetic fields of planets and stars come from?

- In this podcast Paul Shepherd tells us about the maths of football stadiums and why his work required him to listen to Belgian techno.
Amidst all the controversy of the FIFA World Cup 2022 there is also some football to be played. And where there's football, there's maths...

Tosin uses maths to guarantee the continued production of chocolate.

correct me if I'm wrong but "y" is a variable, the d is supposed to represent a differential amount of "y" because that is an integral and usually they tell you what variable you integrate with respect to. In fact I believe that equation is a convolution between the function f and g which is essentially the operation you perform when applying a blurring function. That brings me to a question myself that is, why is the dy raised to the power of 2?