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De Morgan's laws

pair of transformation rules that are both valid rules of inference
Intangible theorem Q173300
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De Morgan's laws

Summary

De Morgan's laws is a theorem[1]. It has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • De Morgan's laws's instance of is recorded as theorem[3].
  • De Morgan's laws's instance of is recorded as rule of inference[4].
  • Augustus De Morgan is named after De Morgan's laws[5].
  • De Morgan's laws's admissible rule in is recorded as classical logic[6].
  • De Morgan's laws's studied by is recorded as logic[7].
  • De Morgan's laws's maintained by WikiProject is recorded as WikiProject Mathematics[8].

Body

Definition and Type

Recorded instance of include theorem[3] and rule of inference[4].

Origins

Augustus De Morgan is named after De Morgan's laws[5].

Why It Matters

De Morgan's laws has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[2] It is known by 15 alternative names across languages and contexts.[9]

Related Entities

Augustus De Morgan Senckenberg – Leibniz Institution for Biodiversity and Earth System Research

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. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata sitelinks. wikidata.org.
  2. [9] ↑ . Wikidata aliases. 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). De Morgan's laws. Retrieved May 3, 2026, from https://4ort.xyz/entity/de-morgan-s-laws
MLA “De Morgan's laws.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/de-morgan-s-laws.
BibTeX @misc{4ortxyz_de-morgan-s-laws_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{De Morgan's laws}}, year = {2026}, url = {https://4ort.xyz/entity/de-morgan-s-laws}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): De Morgan's laws — https://4ort.xyz/entity/de-morgan-s-laws (retrieved 2026-05-03)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 14d ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Named after → Augustus De Morgan
    Maintained by wikiproject → WikiProject Mathematics
    Named after → —
    Studied by → logic
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
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