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NP-hard

complexity class
Thing complexity_class Q1137554
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NP-hard

Summary

NP-hard is a complexity class[1]. NP-hard ranks in the top 2% of complexity_class entities by monthly Wikipedia readership (2,047 views/month).[2]

Key Facts

  • NP-hard's instance of is recorded as complexity class[3].
  • NP-hard is a type of computational problem[4].
  • NP-hard comprises NP-complete[5].
  • NP-hard comprises NP-equivalent[6].
  • NP-hard's topic's main category is recorded as Category:NP-hard problems[7].
  • NP-hard's Stack Exchange tag is recorded as https://cs.stackexchange.com/tags/np-hard[8].
  • NP-hard's Stack Exchange tag is recorded as https://stackoverflow.com/tags/np-hard[9].
  • NP-hard's maintained by WikiProject is recorded as WikiProject Mathematics[10].

Body

Definition and Type

NP-hard's instance of is recorded as complexity class[3]. NP-hard is a type of computational problem[4].

Use and Application

Components include NP-complete[5], a complexity class[11] and NP-equivalent[6], a complexity class[12].

Why It Matters

NP-hard ranks in the top 2% of complexity_class entities by monthly Wikipedia readership (2,047 views/month).[2] NP-hard has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[13] NP-hard is known by 19 alternative names across languages and contexts.[14]

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.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.

Inline context (facts about related entities)

  1. [11] ↑ . Wikidata. wikidata.org. → on this site
  2. [12] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] ↑ . Wikidata sitelinks. wikidata.org.
  3. [14] ↑ . 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). NP-hard. Retrieved May 3, 2026, from https://4ort.xyz/entity/np-hard
MLA “NP-hard.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/np-hard.
BibTeX @misc{4ortxyz_np-hard_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{NP-hard}}, year = {2026}, url = {https://4ort.xyz/entity/np-hard}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): NP-hard — https://4ort.xyz/entity/np-hard (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. 6d ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → yanVh
    Instance of → complexity class
    Has part(s) → NP-complete, NP-equivalent
    Has parts → —
    + 6 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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