Connective spectrum

{{Short description|Spectrum with a negative homotopy of zero}}

In algebraic topology, a branch of mathematics, a connective spectrum is a spectrum whose homotopy sets $\backslash pi\_k$ of negative degrees are zero.{{citation|title=Representation Theory and Higher Algebraic K-Theory|first=Aderemi|last=Kuku|publisher=CRC Press|year=2006|isbn=9781584886037|page=96|url=https://books.google.com/books?id=m_35mRPi-KwC&pg=PA96}}.