Hardy's inequality

inequality relating a real number greater than 1 and a sequence of non-negative numbers
Intangible theorem Q944228
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Hardy's inequality

Summary

Hardy's inequality is a theorem[1]. It draws 90 Wikipedia views per month (theorem category, ranking #218 of 1,306).[2]

Key Facts

  • Hardy's inequality's instance of is recorded as theorem[3].
  • Hardy's inequality's instance of is recorded as inequality[4].
  • G.H. Hardy is named after Hardy's inequality[5].
  • Hardy's inequality's Freebase ID is recorded as /m/0h0f6j[6].
  • Hardy's inequality's defining formula is recorded as \sum_{n=1}^\infty \left (\frac{a_1+a_2+\cdots +a_n}{n}\right )^p<\left (\frac{p}{p-1}\right )^p\sum_{n=1}^\infty a_n^p<sup id="cite-C10" class="cite-ref" title="Hardy's inequality — defining formula (P2534): \sum_{n=1}^\infty \left (\frac{a_1+a_2+\cdots +a_n}{n}\right )^p<\left (\frac{p}{p-1}\right )^p\sum_{n=1}^\infty a_n^p">[7].
  • Hardy's inequality's MathWorld ID is recorded as HardysInequality[8].
  • Hardy's inequality's maintained by WikiProject is recorded as WikiProject Mathematics[9].
  • Hardy's inequality's Microsoft Academic ID is recorded as 2776277431[10].

Why It Matters

Hardy's inequality draws 90 Wikipedia views per month (theorem category, ranking #218 of 1,306).[2] It has Wikipedia articles in 10 language editions, a strong signal of global cultural recognition.[11]

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

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