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proof by contradiction

form of proof
Thing general Q184899
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proof by contradiction

Summary

proof by contradiction ranks in the top 2% of general entities by monthly Wikipedia readership (2,350 views/month).[1]

Key Facts

  • proof by contradiction is a type of mathematical proof[2].
  • proof by contradiction is a type of theorem[3].
  • proof by contradiction's said to be the same as is recorded as reductio ad absurdum[4].
  • proof by contradiction's described by source is recorded as Q140169500[5].
  • proof by contradiction's maintained by WikiProject is recorded as WikiProject Mathematics[6].

Body

Definition and Type

Recorded subclass of include mathematical proof[2] and theorem[3].

Why It Matters

proof by contradiction ranks in the top 2% of general entities by monthly Wikipedia readership (2,350 views/month).[1] It has Wikipedia articles in 20 language editions, a strong signal of global cultural recognition.[7] It is known by 100 alternative names across languages and contexts.[8]

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [7] ↑ . Wikidata sitelinks. wikidata.org.
  3. [8] ↑ . 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). proof by contradiction. Retrieved April 10, 2026, from https://4ort.xyz/entity/proof-by-contradiction
MLA “proof by contradiction.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/proof-by-contradiction.
BibTeX @misc{4ortxyz_proof-by-contradiction_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{proof by contradiction}}, year = {2026}, url = {https://4ort.xyz/entity/proof-by-contradiction}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): proof by contradiction — https://4ort.xyz/entity/proof-by-contradiction (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/proof-by-contradiction · Last refreshed:

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. 6d ago · AddyLockPool · 2026-09-17 view diff on Wikidata ↗
    Maintained by wikiproject → WikiProject Mathematics
    Said to be the same as → reductio ad absurdum
    Subclass of → —
    Subclass of → mathematical proof, theorem
    + 2 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ [[Property:P1343]]: [[Q140169500]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.