spectrum

in algebraic topology, a sequence of spaces Xᵢ with structure maps ΣXᵢ → Xᵢ₊₁ from (reduced) suspensions, such that its stable homotopy groups can be defined
Intangible mathematical_concept Q7575269
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spectrum

Summary

spectrum is a mathematical concept[1]. spectrum draws 26 Wikipedia views per month (mathematical_concept category, ranking #242 of 1,007).[2]

Key Facts

  • spectrum's instance of is recorded as mathematical concept[3].
  • spectrum's subclass of is recorded as sequence[4].
  • spectrum's Freebase ID is recorded as /m/04032_[5].
  • spectrum's topic's main category is recorded as Category:Spectra (topology)[6].
  • spectrum's defining formula is recorded as \begin{aligned}&E=(E_i){i\in\mathbb N}=(E_0,E_1,\dotsc)\&i_n\colon\Sigma E_n\to E{n+1}\end{aligned}[7].
  • spectrum's studied by is recorded as stable homotopy theory[8].
  • spectrum's nLab ID is recorded as spectrum[9].
  • spectrum's maintained by WikiProject is recorded as WikiProject Mathematics[10].
  • spectrum's Microsoft Academic ID is recorded as 170024260[11].
  • spectrum's in defining formula is recorded as E_i[12].
  • spectrum's in defining formula is recorded as \Sigma[13].
  • spectrum's in defining formula is recorded as \mathbb N[14].

Why It Matters

spectrum draws 26 Wikipedia views per month (mathematical_concept category, ranking #242 of 1,007).[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). spectrum. Retrieved May 3, 2026, from https://4ort.xyz/entity/spectrum-q7575269
MLA “spectrum.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/spectrum-q7575269.
BibTeX @misc{4ortxyz_spectrum-q7575269_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{spectrum}}, year = {2026}, url = {https://4ort.xyz/entity/spectrum-q7575269}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): spectrum — https://4ort.xyz/entity/spectrum-q7575269 (retrieved 2026-05-03)

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