Leo watched the glitter disappear into the drain. "This math is why we can price an option on Wall Street or predict how a virus spreads through a city. We are learning to calculate the logic of the wind. We aren't just measuring the path; we’re measuring the uncertainty itself."
"You’ve spent years mastering calculus," Leo said, tossing a handful of glitter into the churning water. "In that world, if you know the velocity and the starting point, you can predict exactly where a particle lands. It’s elegant. It’s clean. And in the real world, it’s mostly useless." An Informal Introduction to Stochastic Calculus...
He pulled a small notebook from his pocket. "The hero of our story is . In normal calculus, the change in a function depends on the change in Leo watched the glitter disappear into the drain
He turned back to the group, his eyes bright. "Now, let’s go inside and see why dt2d t squared equals zero, but dW2d cap W squared . That’s where the magic starts." We aren't just measuring the path; we’re measuring
