mathematical symbol signifying set membership
Place mathematical_symbol Q2221333
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Summary

∈ is a mathematical symbol[1].

Key Facts

  • ∈ is credited with the discovery of Giuseppe Peano[2].
  • ∈'s image is recorded as Unicode 0x2208.svg[3].
  • ∈'s instance of is recorded as mathematical symbol[4].
  • ∈'s instance of is recorded as Unicode character[5].
  • ∈'s Commons category is recorded as ∈[6].
  • ∈'s Unicode character is recorded as ∈[7].
  • ∈'s time of discovery or invention is recorded as +1889-00-00T00:00:00Z[8].
  • ∈'s described by source is recorded as Arithmetices principia, nova methodo exposita[9].
  • ∈'s different from is recorded as chemical symbol[10].
  • ∈'s TeX string is recorded as \in[11].
  • ∈'s homoglyph is recorded as ⫙[12].
  • ∈'s Google Knowledge Graph ID is recorded as /g/12pgcz325[13].
  • ∈'s Unicode code point is recorded as 2208[14].
  • ∈'s HTML entity is recorded as ∈[15].
  • ∈'s HTML entity is recorded as ∈[16].
  • ∈'s HTML entity is recorded as ∈[17].
  • ∈'s HTML entity is recorded as ∈[18].
  • ∈'s HTML entity is recorded as ∈[19].
  • ∈'s HTML entity is recorded as ∈[20].
  • ∈'s 3D model is recorded as U+2208 Noto Sans Math 20230108.stl[21].
  • ∈'s GlyphWiki ID is recorded as u2208[22].
  • ∈'s Unicode block is recorded as Mathematical Operators[23].
  • ∈'s ProofWiki ID is recorded as Symbols:Set_Theory/Element[24].
  • ∈'s Namuwiki ID is recorded as ∈[25].
  • ∈'s Unicode character name is recorded as ELEMENT OF[26].

Body

Designation and Status

Recorded instance of include mathematical symbol[4] and Unicode character[5].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [2] . jeff560.tripod.com. jeff560.tripod.com. Provenance: wikidata.org.
  5. [6] . wikidata.org.
  6. [7] . wikidata.org.
  7. [8] . jeff560.tripod.com. jeff560.tripod.com. Provenance: wikidata.org.
  8. [9] . jeff560.tripod.com. jeff560.tripod.com. Provenance: wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . wikidata.org.
  11. [12] . Unicode 13.0. unicode.org. Provenance: wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . wikidata.org.
  14. [15] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  15. [16] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  16. [17] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  17. [18] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  18. [19] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  19. [20] . html.spec.whatwg.org. html.spec.whatwg.org. Provenance: wikidata.org.
  20. [21] . wikidata.org.
  21. [22] . wikidata.org.
  22. [23] . wikidata.org.
  23. [24] . wikidata.org.
  24. [25] . wikidata.org.
  25. [26] . unicode.org. unicode.org. Provenance: wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). . Retrieved May 3, 2026, from https://4ort.xyz/entity/--q2221333
MLA “∈.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/--q2221333.
BibTeX @misc{4ortxyz_--q2221333_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{∈}}, year = {2026}, url = {https://4ort.xyz/entity/--q2221333}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): — https://4ort.xyz/entity/--q2221333 (retrieved 2026-05-03)

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