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• CommentRowNumber1.
• CommentAuthorUrs
• CommentTimeApr 29th 2014
• (edited Apr 29th 2014)

This used to be a super-brief paragraph at topological K-theory; and now it is a slightly longer but still stubby entry comparison map between algebraic and topological K-theory

• CommentRowNumber2.
• CommentAuthorColin Tan
• CommentTimeApr 29th 2014

It is written at comparison map between algebraic and topological K-theory that there is a natural homomorphism $K{\mathbb{C}}\to KU$ of spectra. What does natural mean here?

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeApr 29th 2014
• (edited Apr 29th 2014)

Right, I should maybe better have written “canonical”. On the other hand, in the perspective from cohesion disussed there it is indeed natural, in that it is a natural transformation between two functors.

• CommentRowNumber4.
• CommentAuthorUrs
• CommentTimeApr 29th 2014

Okay, I have changed and expanded the wording on this point in the entry.

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