Kadison–Singer problem

unique extension of pure states in Hilbert spaces
Thing mathematical_problem Q25304456
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Kadison–Singer problem

Summary

Kadison–Singer problem is a mathematical problem[1]. It draws 13 Wikipedia views per month (mathematical_problem category, ranking #77 of 128).[2]

Key Facts

  • Kadison–Singer problem's instance of is recorded as mathematical problem[3].
  • Kadison–Singer problem's instance of is recorded as mathematical concept[4].
  • Richard Kadison is named after Kadison–Singer problem[5].
  • Isadore Singer is named after Kadison–Singer problem[6].
  • Kadison–Singer problem's solved by is recorded as Adam Marcus[7].
  • Kadison–Singer problem's solved by is recorded as Daniel Spielman[8].
  • Kadison–Singer problem's solved by is recorded as Nikhil Srivastava[9].
  • Kadison–Singer problem's Google Knowledge Graph ID is recorded as /g/11bxb8s73p[10].

Why It Matters

Kadison–Singer problem draws 13 Wikipedia views per month (mathematical_problem category, ranking #77 of 128).[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). Kadison–Singer problem. Retrieved May 3, 2026, from https://4ort.xyz/entity/kadison-singer-problem
MLA “Kadison–Singer problem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/kadison-singer-problem.
BibTeX @misc{4ortxyz_kadison-singer-problem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Kadison–Singer problem}}, year = {2026}, url = {https://4ort.xyz/entity/kadison-singer-problem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Kadison–Singer problem — https://4ort.xyz/entity/kadison-singer-problem (retrieved 2026-05-03)

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