Neil Strickland
Published 2020-01-21Version 1
We verify that a certain functor $D\colon\text{Sp}^\Sigma(\text{Ch}^+)\to\text{Ch}$ is symmetric monoidal. This functor is used elsewhere in developing the model category theory of symmetric spectra and of chain complexes graded over $\mathbb{N}$ or $\mathbb{Z}$.
Comments: This is a very old note, which has been circulating privately. I have been asked to upload it so that people can refer to it
Spectra and symmetric spectra in general model categories
Homotopy theory of modules over operads in symmetric spectra
On the homotopy groups of symmetric spectra
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