# Page Not Found

The URL `en/articles/11668482-do-i-have-to-enter-physics-constraints-manually` does not exist.

You might be looking for one of these pages:
- [Define physics constraints](https://docs.quilter.ai/using-quilter/define-physics-constraints.md)
- [Differential Pairs](https://docs.quilter.ai/physics-constraints/differential-pairs.md)
- [Switching Converters](https://docs.quilter.ai/physics-constraints/switching-converters.md)
- [Single-ended Impedance Control](https://docs.quilter.ai/physics-constraints/single-ended-impedance-control.md)
- [Fabrication rules](https://docs.quilter.ai/design-parameters/fabrication-rules.md)

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