# Smooth implies ... theorem

Let $X$, $Y$ be schemes, and possibly some arrows, satisfying the following conditions:

Then

- $f$ flat, formally smooth, locally of finite presentation

## References

- Stacks Project, https://stacks.math.columbia.edu/tag/02H6 (Fabio)
- Stacks Project, https://stacks.math.columbia.edu/tag/01VF (Fabio)