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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeMay 2nd 2014
   • PermaLink
   Author: Urs
   Format: MarkdownItexnoticed that the Idea-section at _[[ring spectrum]]_ didn't at all address the evident subtlety here. Have expanded now to make this clear.

   noticed that the Idea-section at ring spectrum didn’t at all address the evident subtlety here. Have expanded now to make this clear.

2. • CommentRowNumber2.
   • CommentAuthorUrs
   • CommentTimeJan 11th 2021
   • (edited Jan 11th 2021)
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded DOI to * R. Bruner, [[Peter May]], [[James McClure]], M. Steinberger, _$H_\infty$-Ring Spectra and their Applications_, Lecture Notes in Mathematics 1176, Springer 1986 ([doi:10.1007/BFb0075405](https://link.springer.com/book/10.1007/BFb0075405), [pdf](http://www.math.uchicago.edu/~may/BOOKS/h_infty.pdf)) <a href="https://ncatlab.org/nlab/revision/diff/ring+spectrum/44">diff</a>, <a href="https://ncatlab.org/nlab/revision/ring+spectrum/44">v44</a>, <a href="https://ncatlab.org/nlab/show/ring+spectrum">current</a>

   added DOI to

   • R. Bruner, Peter May, James McClure, M. Steinberger, $H_\infty$-Ring Spectra and their Applications, Lecture Notes in Mathematics 1176, Springer 1986 (doi:10.1007/BFb0075405, pdf)

   diff, v44, current

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeJan 11th 2021
   • PermaLink
   Author: Urs
   Format: MarkdownItexWhat's actually the _original_ reference on the concept of (homotopy commutative) rind spectra, if any? In [Adams 74](https://ncatlab.org/nlab/show/ring+spectrum#Adams74) it says on p. 246, without citation: > G.W. Whitehead introduced the notion of a ring spectrum Is this meant to acknowledge private communication, or is there a publication by Whitehead that could be cited here? <a href="https://ncatlab.org/nlab/revision/diff/ring+spectrum/44">diff</a>, <a href="https://ncatlab.org/nlab/revision/ring+spectrum/44">v44</a>, <a href="https://ncatlab.org/nlab/show/ring+spectrum">current</a>

   What’s actually the original reference on the concept of (homotopy commutative) rind spectra, if any?

   In Adams 74 it says on p. 246, without citation:

   G.W. Whitehead introduced the notion of a ring spectrum

   Is this meant to acknowledge private communication, or is there a publication by Whitehead that could be cited here?

   diff, v44, current

4. • CommentRowNumber4.
   • CommentAuthorUrs
   • CommentTimeJan 11th 2021
   • (edited Jan 11th 2021)
   • PermaLink
   Author: Urs
   Format: MarkdownItexTook the liberty of adding this to the list of references for homotopy-commutative ring spectra: * [[Urs Schreiber]], _[[Introduction to Stable homotopy theory]] -- [Homotopy ring spectra](https://ncatlab.org/nlab/show/Introduction+to+Stable+homotopy+theory+--+1-2#HomotopyRingSpectra)_, 2016 <a href="https://ncatlab.org/nlab/revision/diff/ring+spectrum/44">diff</a>, <a href="https://ncatlab.org/nlab/revision/ring+spectrum/44">v44</a>, <a href="https://ncatlab.org/nlab/show/ring+spectrum">current</a>

   Took the liberty of adding this to the list of references for homotopy-commutative ring spectra:

   • Urs Schreiber, Introduction to Stable homotopy theory – Homotopy ring spectra, 2016

   diff, v44, current

5. • CommentRowNumber5.
   • CommentAuthorUrs
   • CommentTimeJan 20th 2021
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to: * [[Birgit Richter]], _Commutative ring spectra_ ([arXiv:1710.02328](https://arxiv.org/abs/1710.02328)) <a href="https://ncatlab.org/nlab/revision/diff/ring+spectrum/47">diff</a>, <a href="https://ncatlab.org/nlab/revision/ring+spectrum/47">v47</a>, <a href="https://ncatlab.org/nlab/show/ring+spectrum">current</a>

   added pointer to:

   • Birgit Richter, Commutative ring spectra (arXiv:1710.02328)

   diff, v47, current