Sheaf of spectra explained

\pi _{*} F \to \pi _{*} G is an isomorphism. A sheaf of spectra is then a fibrant/cofibrant object in that category.

The notion is used to define, for example, a derived scheme in algebraic geometry.

External links

• Web site: Schemes . Paul . Goerss . TAG Lecture 2 . 16 June 2008 .