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rule of sum

counting principle in combinatorics
Thing combinatorial_principle Q2360148
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rule of sum

Summary

rule of sum is a combinatorial principle[1]. It draws 16 Wikipedia views per month (combinatorial_principle category, ranking #2 of 2).[2]

Key Facts

  • rule of sum's instance of is recorded as combinatorial principle[3].
  • rule of sum's Freebase ID is recorded as /m/05f5qr[4].
  • rule of sum's defining formula is recorded as A\cap B = \phi \implies |A \cup B| = |A| + |B|[5].
  • rule of sum's Microsoft Academic ID is recorded as 205878236[6].
  • rule of sum's Australian Educational Vocabulary ID is recorded as scot/15504[7].
  • rule of sum's in defining formula is recorded as A[8].
  • rule of sum's in defining formula is recorded as B[9].
  • rule of sum's in defining formula is recorded as \cup[10].
  • rule of sum's in defining formula is recorded as ||[11].

Why It Matters

rule of sum draws 16 Wikipedia views per month (combinatorial_principle category, ranking #2 of 2).[2] It has Wikipedia articles in 15 language editions, a strong signal of global cultural recognition.[12] It is known by 6 alternative names across languages and contexts.[13]

References

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

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . Freebase Data Dumps. wikidata.org.
  3. [5] ↑ . PlanetMath. Retrieved . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [12] ↑ . Wikidata sitelinks. wikidata.org.
  3. [13] ↑ . 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). rule of sum. Retrieved May 3, 2026, from https://4ort.xyz/entity/rule-of-sum
MLA “rule of sum.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/rule-of-sum.
BibTeX @misc{4ortxyz_rule-of-sum_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{rule of sum}}, year = {2026}, url = {https://4ort.xyz/entity/rule-of-sum}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): rule of sum — https://4ort.xyz/entity/rule-of-sum (retrieved 2026-05-03)

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