In algebraic topology, the mapping spectrum F(X,Y){\displaystyle F(X,Y)}of spectra X, Y is characterized by
of spectra X, Y is characterized by![{\displaystyle [X\wedge Y,Z]=[X,F(Y,Z)].}](https://wikimedia.org/api/rest_v1/media/math/render/svg/ae9522055fd7563739043595cae93e969d27374c)