Spectrum (topology)

In topology, the term "spectrum" often refers to the spectrum of a topological space or a mathematical structure associated with it. Two commonly encountered contexts in which the term "spectrum" is used include algebraic topology and categorical topology. Here are some explanations of both contexts: 1. **Spectrum in Algebraic Topology**: In algebraic topology, the term "spectrum" can refer to a sequence of spaces or a generalized space arising in stable homotopy theory.