Calculus Basics

The sequence is organized around one idea: describe change locally, then accumulate it globally.

1. Limits establish local behavior and continuity.
2. Derivatives measure instantaneous change.
3. Integrals accumulate quantities and connect back to derivatives.
4. Gradients and Gradient Descent extend change to several variables.
5. Optimization turns derivatives into decisions.
6. Optimization in Neural Networks applies the machinery to learning systems.

The misspelled intergral directory remains in place to preserve its existing URLs.