boundary · limit
The place where a thing ends and what is not the thing begins.
Examples
- The event horizon of black hole Sagittarius A* marks where Earth's observations cease, at 26,000 light-years distance. physics
- The Great Barrier Reef's outer edge, surveyed at 2,300 kilometers long, separates coral ecosystems from open Pacific waters. biology
- The Berlin Wall stood from 1961 to 1989, demarcating East and West Berlin at 155 kilometers long. institutions
Emergence
through: Difference located in space: where one pattern stops matching and another begins, marking a shift across space.
- spatial differentiation
- transition threshold
- discontinuity in pattern
Chain to foundations
Neighborhood
Concepts that depend on this one above; what it is built from below.
Used by (118)
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