An Informal Introduction To - Stochastic Calculus...

"We change the rules," Leo grinned. "Enter . Imagine a drunkard’s walk in three dimensions. We can’t say where the glitter will be, but we can describe the distribution of where it might go. We stop looking for a single line and start looking at the 'drift' and the 'diffusion.'"

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." 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 "We change the rules," Leo grinned