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Mathematical Object

Disk (Mathematics)

Geometry

In geometry, a disk, also spelled disc, is the region in a plane bounded by a circle. A disk is called closed if it includes the bounding circle and open if it does not; an open disk of radius r is commonly denoted D sub r and a closed disk of radius r is denoted with an overline, while in topology the closed unit disk is usually written D squared and the open unit disk as the interior of D squared. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

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Classification
Object Kind
Geometric Object 1
Connections

Is Kind Of Object

Entity-backed identity for the object-kind enum value this mathematical object already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The object-kind fact itself stays on the object unchanged.

Sources
1. Disk (Mathematics) (Wikipedia)
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