# centre (location)

the part of a space that is just between the boundaries

- Computed level: L3 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: centre

## Emergence
**Emerges from:** [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [just](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-just.exact), [part](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-part.relation)

**Through:** When space.extent and boundary.limit are together, augmented by just.exact and part.relation, they produce a region that is strictly within the bounds and equal to none but the middle.

**Novel properties:**
- central position
- interior equality
- bounded balance

## Examples
- The Vatican Obelisk stands exactly where it was placed in 1586 at the centre of St. Peter's Square, equidistant from the enclosing colonnades. *(institutions)*
- In 1971, Apollo 15 landed within 1 km of Hadley Rille's midpoint, the planned centre of the exploration zone. *(spaceflight)*
- The zero mark on a meter stick defines the centre between its 0 cm and 100 cm ends, used to balance the ruler on a fingertip. *(physics)*

## Used by
- [comfortable](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-comfortable.central) (L14)
- [homeostasis](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-homeostasis.regulation) (L16)
- [moderation](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-moderation.central) (L13)
- [stable](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-stable.condition) (L15)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-centre.location*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-centre.location.json*  
*Every definition provably resolves to space, time, energy and pattern.*