(Q7575269)
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Wikipedia(4 entries)
- dewiki Spektrum (Topologie)
- enwiki Spectrum (topology)
- frwiki Spectre (topologie)
- kowiki 스펙트럼 (위상수학)
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