Littlewood's 4/3 inequality

inequality that holds for every complex-valued bilinear form defined on the Banach space of scalar sequences that converge to zero
Intangible theorem Q25100274
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Littlewood's 4/3 inequality

Summary

Littlewood's 4/3 inequality is a theorem[1]. It draws 4 Wikipedia views per month (theorem category, ranking #275 of 1,306).[2]

Key Facts

  • Littlewood's 4/3 inequality's instance of is recorded as theorem[3].
  • Littlewood's 4/3 inequality's proved by is recorded as John Edensor Littlewood[4].
  • Littlewood's 4/3 inequality's defining formula is recorded as \left( \sum_{i,j=1}^\infty |B(e_i,e_j)|^{4/3} \right)^{3/4} \le \sqrt{2} | B |[5].
  • Littlewood's 4/3 inequality's Google Knowledge Graph ID is recorded as /g/11bx1cd6bp[6].
  • Littlewood's 4/3 inequality's maintained by WikiProject is recorded as WikiProject Mathematics[7].

Why It Matters

Littlewood's 4/3 inequality draws 4 Wikipedia views per month (theorem category, ranking #275 of 1,306).[2]

📑 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). Littlewood's 4/3 inequality. Retrieved May 3, 2026, from https://4ort.xyz/entity/littlewood-s-4-3-inequality
MLA “Littlewood's 4/3 inequality.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/littlewood-s-4-3-inequality.
BibTeX @misc{4ortxyz_littlewood-s-4-3-inequality_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Littlewood's 4/3 inequality}}, year = {2026}, url = {https://4ort.xyz/entity/littlewood-s-4-3-inequality}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Littlewood's 4/3 inequality — https://4ort.xyz/entity/littlewood-s-4-3-inequality (retrieved 2026-05-03)

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