# Page Not Found

The URL `courses/hoon-school/D-gates` does not exist.

You might be looking for one of these pages:
- [3. Gates (Functions)](https://docs.urbit.org/build-on-urbit/hoon-school/d-gates.md)
- [4. Molds (Types)](https://docs.urbit.org/build-on-urbit/hoon-school/e-types.md)
- [5. Cores](https://docs.urbit.org/build-on-urbit/hoon-school/f-cores.md)
- [6. Trees and Addressing](https://docs.urbit.org/build-on-urbit/hoon-school/g-trees.md)
- [19. Mathematics](https://docs.urbit.org/build-on-urbit/hoon-school/s-math.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.urbit.org/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.urbit.org/llms-full.txt) - Full content export

## Tips for requesting documentation

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